Draft articles on
Responsibility of States for Internationally Wrongful Acts,
with commentaries
2001
Text adopted by the International Law Commission at its fifty-third session, in
2001, and submitted to the General Assembly as a part of the Commission’s report
covering the work of that session (A/56/10). The report, which also contains
commentaries on the draft articles, appears in the Yearbook of the International Law
Commission, 2001, vol. II, Part Two, as corrected.
Copyright © United Nations
2008
	 State responsibility	 31
RESPONSIBILITY OF STATES FOR
INTERNATIONALLY WRONGFUL ACTS
General commentary
(1)  These articles seek to formulate, by way of codification
and progressive development, the basic rules of
international law concerning the responsibility of States
for their internationally wrongful acts. The emphasis is
on the secondary rules of State responsibility: that is to
say, the general conditions under international law for the
State to be considered responsible for wrongful actions or
omissions, and the legal consequences which flow therefrom.
The articles do not attempt to define the content of
the international obligations, the breach of which gives
rise to responsibility. This is the function of the primary
rules, whose codification would involve restating most of
substantive customary and conventional international
law.
(2)  Roberto Ago, who was responsible for establishing
the basic structure and orientation of the project, saw the
articles as specifying:
the principles which govern the responsibility of States for internationally
wrongful acts, maintaining a strict distinction between this task
and the task of defining the rules that place obligations on States, the
violation of which may generate responsibility … [I]t is one thing to
define a rule and the content of the obligation it imposes, and another
to determine whether that obligation has been violated and what should
be the consequences of the violation.32
(3)  Given the existence of a primary rule establishing
an obligation under international law for a State, and assuming
that a question has arisen as to whether that State
has complied with the obligation, a number of further
issues of a general character arise. These include:
(a)  The role of international law as distinct from the
internal law of the State concerned in characterizing
conduct as unlawful;
(b)  Determining in what circumstances conduct is
to be attributed to the State as a subject of international
law;
(c)  Specifying when and for what period of time there
is or has been a breach of an international obligation by
a State;
(d)  Determining in what circumstances a State may be
responsible for the conduct of another State which is incompatible
with an international obligation of the latter;
(e)  Defining the circumstances in which the wrongfulness
of conduct under international law may be pre-
cluded;
(f)  Specifying the content of State responsibility, i.e.
the new legal relations that arise from the commission
by a State of an internationally wrongful act, in terms of
cessation of the wrongful act, and reparation for any
injury done;
(g)  Determining any procedural or substantive preconditions
for one State to invoke the responsibility of
32 Yearbook ... 1970, vol. II, p. 306, document A/8010/Rev.l,
para. 66 (c).
another State, and the circumstances in which the right to
invoke responsibility may be lost;
(h)  Laying down the conditions under which a State
may be entitled to respond to a breach of an international
obligation by taking countermeasures designed to ensure
the fulfilment of the obligations of the responsible State
under these articles.
This is the province of the secondary rules of State
responsibility.
(4)  A number of matters do not fall within the scope of
State responsibility as dealt with in the present articles:
(a)  As already noted, it is not the function of the articles
to specify the content of the obligations laid down by
particular primary rules, or their interpretation. Nor do the
articles deal with the question whether and for how long
particular primary obligations are in force for a State. It
is a matter for the law of treaties to determine whether a
State is a party to a valid treaty, whether the treaty is in
force for that State and with respect to which provisions,
and how the treaty is to be interpreted. The same is true,
mutatis mutandis, for other “sources” of international obligations,
such as customary international law. The articles
take the existence and content of the primary rules
of international law as they are at the relevant time; they
provide the framework for determining whether the consequent
obligations of each State have been breached, and
with what legal consequences for other States.
(b)  The consequences dealt with in the articles are
those which flow from the commission of an internationally
wrongful act as such.33 No attempt is made to deal
with the consequences of a breach for the continued validity
or binding effect of the primary rule (e.g. the right of
an injured State to terminate or suspend a treaty for material
breach, as reflected in article 60 of the 1969 Vienna
Convention). Nor do the articles cover such indirect or
additional consequences as may flow from the responses
of international organizations to wrongful conduct. In carrying
out their functions it may be necessary for international
organizations to take a position on whether a State
has breached an international obligation. But even where
this is so, the consequences will be those determined by
or within the framework of the constituent instrument of
the organization, and these fall outside the scope of the
articles. This is particularly the case with action of the
United Nations under the Charter, which is specifically
reserved by article 59.
(c)  The articles deal only with the responsibility for
conduct which is internationally wrongful. There may be
cases where States incur obligations to compensate for the
injurious consequences of conduct which is not prohibited,
and may even be expressly permitted, by international law
(e.g. compensation for property duly taken for a public
purpose). There may also be cases where a State is obliged
to restore the status quo ante after some lawful activity
has been completed. These requirements of compensation
or restoration would involve primary obligations; it would
be the failure to pay compensation, or to restore the status
33 For the purposes of the articles, the term “internationally wrongful
act” includes an omission and extends to conduct consisting of
several actions or omissions which together amount to an internationally
wrongful act. See paragraph (1) of the commentary to article 1.
32	 Report of the International Law Commission on the work of its fifty-third session
quo which would engage the international responsibility
of the State concerned. Thus for the purposes of these
articles, international responsibility results exclusively
from a wrongful act contrary to international law. This is
reflected in the title of the articles.
(d)  The articles are concerned only with the responsibility
of States for internationally wrongful conduct, leaving
to one side issues of the responsibility of international
organizations or of other non-State entities (see articles
57 and 58).
(5)  On the other hand, the present articles are concerned
with the whole field of State responsibility. Thus they are
not limited to breaches of obligations of a bilateral character,
e.g. under a bilateral treaty with another State. They
apply to the whole field of the international obligations
of States, whether the obligation is owed to one or several
States, to an individual or group, or to the international
community as a whole. Being general in character, they
are also for the most part residual. In principle, States are
free, when establishing or agreeing to be bound by a rule,
to specify that its breach shall entail only particular consequences
and thereby to exclude the ordinary rules of
responsibility. This is made clear by article 55.
(6)  The present articles are divided into four parts. Part
One is entitled “The internationally wrongful act of a
State”. It deals with the requirements for the international
responsibility of a State to arise. Part Two, “Content of
the international responsibility of a State”, deals with the
legal consequences for the responsible State of its internationally
wrongful act, in particular as they concern cessation
and reparation. Part Three is entitled “The implementation
of the international responsibility of a State”.
It identifies the State or States which may react to an
internationally wrongful act and specifies the modalities
by which this may be done, including, in certain circumstances,
by the taking of countermeasures as necessary to
ensure cessation of the wrongful act and reparation for its
consequences. Part Four contains certain general provisions
applicable to the articles as a whole.
Part One
THE INTERNATIONALLY WRONGFUL
ACT OF A STATE
Part One defines the general conditions necessary for
State responsibility to arise. Chapter I lays down three basic
principles for responsibility from which the articles
as a whole proceed. Chapter II defines the conditions
under which conduct is attributable to the State. Chapter
III spells out in general terms the conditions under which
such conduct amounts to a breach of an international obligation
of the State concerned. Chapter IV deals with certain
exceptional cases where one State may be responsible
for the conduct of another State not in conformity with an
international obligation of the latter. Chapter V defines
the circumstances precluding the wrongfulness for conduct
not in conformity with the international obligations
of a State.
Chapter I
GENERAL PRINCIPLES
Article 1.  Responsibility of a State for its
internationally wrongful acts
Every internationally wrongful act of a State entails
the international responsibility of that State.
Commentary
(1)  Article 1 states the basic principle underlying the
articles as a whole, which is that a breach of international
law by a State entails its international responsibility.
An internationally wrongful act of a State may consist
in one or more actions or omissions or a combination of
both. Whether there has been an internationally wrongful
act depends, first, on the requirements of the obligation
which is said to have been breached and, secondly, on the
framework conditions for such an act, which are set out in
Part One. The term “international responsibility” covers
the new legal relations which arise under international law
by reason of the internationally wrongful act of a State.
The content of these new legal relations is specified in
Part Two.
(2)  PCIJ applied the principle set out in article 1 in a
number of cases. For example, in the Phosphates in Morocco
case, PCIJ affirmed that when a State commits an
internationally wrongful act against another State international
responsibility is established “immediately as between
the two States”.34 ICJ has applied the principle on
severaloccasions,forexampleintheCorfuChannelcase,35
in the Military and Paramilitary Activities in and against
Nicaragua case,36 and in the Gabˇcíkovo-Nagymaros
Project case.37 The Court also referred to the principle
in its advisory opinions on Reparation for Injuries,38 and
on the Interpretation of Peace Treaties (Second Phase),39
in which it stated that “refusal to fulfil a treaty obligation
involves international responsibility”.40 Arbitral tribunals
have repeatedly affirmed the principle, for example in the
Claims of Italian Nationals Resident in Peru cases,41 in
34 Phosphates in Morocco, Judgment, 1938, P.C.I.J., Series A/B,
No. 74, p. 10, at p. 28. See also S.S. “Wimbledon”, 1923, P.C.I.J.,
Series A, No. 1, p. 15, at p. 30; Factory at Chorzów, Jurisdiction, Judgment
No. 8, 1927, P.C.I.J., Series A, No. 9, p. 21; and ibid., Merits,
Judgment No. 13, 1928, P.C.I.J., Series A, No. 17, p. 29.
35 Corfu Channel, Merits, Judgment, I.C.J. Reports 1949, p. 4, at
p. 23.
36 Military and Paramilitary Activities in and against Nicaragua
(Nicaragua v. United States of America), Merits, Judgment, I.C.J.
Reports 1986, p. 14, at p. 142, para. 283, and p. 149, para. 292.
37 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), at p. 38,
para. 47.
38 Reparation for Injuries Suffered in the Service of the United
Nations, Advisory Opinion, I.C.J. Reports 1949, p. 174, at p. 184.
39 Interpretation of Peace Treaties with Bulgaria, Hungary and 
Romania, Second Phase, Advisory Opinion, I.C.J. Reports 1950,
p. 221.
40 Ibid., p. 228.
41 Seven of these awards rendered in 1901 reiterated that “a universally
recognized principle of international law states that the State
is responsible for the violations of the law of nations committed by its
agents” (UNRIAA, vol. XV (Sales No. 66.V.3), pp. 399 (Chiessa claim),
401 (Sessarego claim), 404 (Sanguinetti claim), 407 (Vercelli claim),
408 (Queirolo claim), 409 (Roggero claim), and 411 (Miglia claim)).
	 State responsibility	 33
the Dickson Car Wheel Company case,42 in the International
Fisheries Company case,43 in the British Claims in
the Spanish Zone of Morocco case44 and in the Armstrong
Cork Company case.45 In the “Rainbow Warrior” case,46
the arbitral tribunal stressed that “any violation by a State
of any obligation, of whatever origin, gives rise to State
responsibility”.47
(3)  That every internationally wrongful act of a State
entails the international responsibility of that State, and
thus gives rise to new international legal relations additional
to those which existed before the act took place,
has been widely recognized, both before48 and since49 article
1 was first formulated by the Commission. It is
true that there were early differences of opinion over the
definition of the legal relationships arising from an internationally
wrongful act. One approach, associated with
Anzilotti, described the legal consequences deriving from
an internationally wrongful act exclusively in terms of a
binding bilateral relationship thereby established between
the wrongdoing State and the injured State, in which the
obligation of the former State to make reparation is set
against the “subjective” right of the latter State to require
reparation. Another view, associated with Kelsen, started
from the idea that the legal order is a coercive order and
saw the authorization accorded to the injured State to apply
a coercive sanction against the responsible State as
the primary legal consequence flowing directly from the
wrongful act.50 According to this view, general international
law empowered the injured State to react to a wrong;
the obligation to make reparation was treated as subsidi-
42 Dickson Car Wheel Company (U.S.A.) v. United Mexican States,
UNRIAA, vol. IV (Sales No. 1951.V.1), p. 669, at p. 678 (1931).
43 International Fisheries Company (U.S.A.) v. United Mexican
States, ibid., p. 691, at p. 701 (1931).
44 According to the arbitrator, Max Huber, it is an indisputable principle
that “responsibility is the necessary corollary of rights. All international
rights entail international responsibility”, UNRIAA, vol. II
(Sales No. 1949.V.1), p. 615, at p. 641 (1925).
45 According to the Italian-United States Conciliation Commission,
no State may “escape the responsibility arising out of the exercise of
an illicit action from the viewpoint of the general principles of international
law”, UNRIAA, vol. XIV (Sales No. 65.V.4), p. 159, at p. 163
(1953).
46 Case concerning the difference between New Zealand and
France concerning the interpretation or application of two agreements
concluded on 9 July 1986 between the two States and which related
to the problems arising from the Rainbow Warrior affair, UNRIAA,
vol. XX (Sales No. E/F.93.V.3), p. 215 (1990).
47 Ibid., p. 251, para. 75.
48 See, e.g., D. Anzilotti, Corso di diritto internazionale, 4th ed.
(Padua, CEDAM, 1955) vol. I, p. 385; W. Wengler, Völkerrecht (Berlin,
Springer, 1964), vol. I, p. 499; G. I. Tunkin, Teoria mezhdunarodnogo
prava (Moscow, Mezhdunarodnye otnoshenia, 1970), p. 470, trans. W.
E. Butler, Theory of International Law (London, George Allen and
Unwin, 1974), p. 415; and E. Jiménez de Aréchaga, “International
responsibility”, Manual of Public International Law, M. Sørensen,
ed. (London, Macmillan, 1968), p. 533.
49 See, e.g., I. Brownlie, Principles of Public International Law,
5th ed. (Oxford University Press, 1998), p. 435; B. Conforti, Diritto
internazionale, 4th ed. (Milan, Editoriale Scientifica, 1995), p. 332;
P. Daillier and A. Pellet, Droit international public (Nguyen Quoc
Dinh), 6th ed. (Paris, Librairie générale de droit et de jurisprudence,
1999), p. 742; P.-M. Dupuy, Droit international public, 4th ed. (Paris,
Dalloz, 1998), p. 414; and R. Wolfrum, “Internationally wrongful acts”,
Encyclopedia of Public International Law, R. Bernhardt, ed. (Amsterdam,
North-Holland, 1995), vol. II, p. 1398.
50 See H. Kelsen, Principles of International Law, 2nd ed., R. W.
Tucker, ed. (New York, Holt, Rinehart and Winston, 1966), p. 22.
ary, a way by which the responsible State could avoid
the application of coercion. A third view, which came to
prevail, held that the consequences of an internationally
wrongful act cannot be limited either to reparation or to
a “sanction”.51 In international law, as in any system of
law, the wrongful act may give rise to various types of
legal relations, depending on the circumstances.
(4)  Opinions have also differed on the question whether
the legal relations arising from the occurrence of an internationally
wrongful act were essentially bilateral, i.e.
concerned only the relations of the responsible State and
the injured State inter se. Increasingly it has been recognized
that some wrongful acts engage the responsibility
of the State concerned towards several or many States or
even towards the international community as a whole. A
significant step in this direction was taken by ICJ in the
Barcelona Traction case when it noted that:
an essential distinction should be drawn between the obligations of a
State towards the international community as a whole, and those arising
vis-à-vis another State in the field of diplomatic protection. By their
very nature the former are the concern of all States. In view of the
importance of the rights involved, all States can be held to have a legal
interest in their protection; they are obligations erga omnes.52
Every State, by virtue of its membership in the international
community, has a legal interest in the protection of
certain basic rights and the fulfilment of certain essential
obligations.Among these the Court instanced “the outlawing
of acts of aggression, and of genocide, as also … the
principles and rules concerning the basic rights of the human
person, including protection from slavery and racial
discrimination”.53 In later cases the Court has reaffirmed
this idea.54 The consequences of a broader conception of
international responsibility must necessarily be reflected
in the articles which, although they include standard bilateral
situations of responsibility, are not limited to them.
(5)  Thus the term “international responsibility” in article
1 covers the relations which arise under international
law from the internationally wrongful act of a State,
whether such relations are limited to the wrongdoing State
and one injured State or whether they extend also to other
States or indeed to other subjects of international law, and
whether they are centred on obligations of restitution or
compensation or also give the injured State the possibility
of responding by way of countermeasures.
(6)  The fact that under article 1 every internationally
wrongful act of a State entails the international responsibility
of that State does not mean that other States may
not also be held responsible for the conduct in question,
or for injury caused as a result. Under chapter II the same
51 See, e.g., R. Ago, “Le délit international”, Recueil des cours...,
1939–II (Paris, Sirey, 1947), vol. 68, p. 415, at pp. 430–440;
and L. Oppenheim, International Law: A Treatise, vol. I, Peace, 8th
ed., H. Lauterpacht, ed. (London, Longmans, Green and Co., 1955),
pp. 352–354.
52 Barcelona Traction (see footnote 25 above), p. 32, para. 33.
53 Ibid., para. 34.
54 See East Timor (Portugal v. Australia), Judgment, I.C.J. Reports
1995, p. 90, at p. 102, para. 29; Legality of the Threat or Use of Nuclear
Weapons, Advisory Opinion, I.C.J. Reports 1996, p. 226, at p. 258,
para. 83; and Application of the Convention on the Prevention and Punishment
of the Crime of Genocide, Preliminary Objections, Judgment,
I.C.J. Reports 1996, p. 595, at pp. 615–616, paras. 31–32.
34	 Report of the International Law Commission on the work of its fifty-third session
conduct may be attributable to several States at the same
time. Under chapter IV, one State may be responsible for
the internationally wrongful act of another, for example
if the act was carried out under its direction and control.
Nonetheless the basic principle of international law is that
each State is responsible for its own conduct in respect of
its own international obligations.
(7)  The articles deal only with the responsibility of
States. Of course, as ICJ affirmed in the Reparation for
Injuries case, the United Nations “is a subject of international
law and capable of possessing international
rights and duties … it has capacity to maintain its rights
by bringing international claims”.55 The Court has also
drawn attention to the responsibility of the United Nations
for the conduct of its organs or agents.56 It may be that the
notion of responsibility for wrongful conduct is a basic element
in the possession of international legal personality.
Nonetheless, special considerations apply to the responsibility
of other international legal persons, and these are
not covered in the articles.57
(8)  As to terminology, the French term fait internationalement
illicite is preferable to délit or other similar
expressions which may have a special meaning in internal
law. For the same reason, it is best to avoid, in English,
such terms as “tort”, “delict” or “delinquency”, or
in Spanish the term delito. The French term fait internationalement
illicite is better than acte internationalement
illicite, since wrongfulness often results from omissions
which are hardly indicated by the term acte. Moreover, the
latter term appears to imply that the legal consequences
are intended by its author. For the same reasons, the term
hecho internacionalmente ilícito is adopted in the Spanish
text. In the English text, it is necessary to maintain the expression
“internationally wrongful act”, since the French
fait has no exact equivalent; nonetheless, the term “act” is
intended to encompass omissions, and this is made clear
in article 2.
Article 2.  Elements of an internationally
wrongful act of a State
There is an internationally wrongful act of a State
when conduct consisting of an action or omission:
(a)  is attributable to the State under international
law; and
(b)  constitutes a breach of an international obligation
of the State.
Commentary
(1)  Article 1 states the basic principle that every internationally
wrongful act of a State entails its international
responsibility. Article 2 specifies the conditions required
to establish the existence of an internationally wrong-
55 Reparation for Injuries (see footnote 38 above), p. 179.
56 Difference Relating to Immunity from Legal Process of a Special
Rapporteur of the Commission on Human Rights, Advisory Opinion,
I.C.J. Reports 1999, p. 62, at pp. 88–89, para. 66.
57 For the position of international organizations, see article 57 and
commentary.
ful act of the State, i.e. the constituent elements of such
an act. Two elements are identified. First, the conduct in
question must be attributable to the State under international
law. Secondly, for responsibility to attach to the act
of the State, the conduct must constitute a breach of an
international legal obligation in force for that State at that
time.
(2)  These two elements were specified, for example,
by PCIJ in the Phosphates in Morocco case. The Court
explicitly linked the creation of international responsibility
with the existence of an “act being attributable to the
State and described as contrary to the treaty right[s] of
another State”.58 ICJ has also referred to the two elements
on several occasions. In the United States Diplomatic and
Consular Staff in Tehran case, it pointed out that, in order
to establish the responsibility of the Islamic Republic of
Iran:
[f]irst, it must determine how far, legally, the acts in question may be
regarded as imputable to the Iranian State. Secondly, it must consider
their compatibility or incompatibility with the obligations of Iran under
treaties in force or under any other rules of international law that may
be applicable.59
Similarly in the Dickson Car Wheel Company case, the
Mexico-United States General Claims Commission noted
that the condition required for a State to incur international
responsibility is “that an unlawful international act be
imputed to it, that is, that there exist a violation of a duty
imposed by an international juridical standard”.60
(3)  The element of attribution has sometimes been
described as “subjective” and the element of breach as
“objective”, but the articles avoid such terminology.61
Whether there has been a breach of a rule may depend
on the intention or knowledge of relevant State organs
or agents and in that sense may be “subjective”. For example,
article II of the Convention on the Prevention and
Punishment of the Crime of Genocide states that: “In the
present Convention, genocide means any of the following
acts committed with intent to destroy, in whole or in part,
a national, ethnical, racial or religious group, as such …”
In other cases, the standard for breach of an obligation
may be “objective”, in the sense that the advertence or
otherwise of relevant State organs or agents may be irrelevant.
Whether responsibility is “objective” or “subjective”
in this sense depends on the circumstances, including
the content of the primary obligation in question. The
articles lay down no general rule in that regard. The same
is true of other standards, whether they involve some degree
of fault, culpability, negligence or want of due diligence.
Such standards vary from one context to another
for reasons which essentially relate to the object and
purpose of the treaty provision or other rule giving rise
to the primary obligation. Nor do the articles lay down
any presumption in this regard as between the different
58 See footnote 34 above.
59 United States Diplomatic and Consular Staff in Tehran, Judgment,
I.C.J. Reports 1980, p. 3, at p. 29, para. 56. Cf. page 41,
para. 90. See also Military and Paramilitary Activities in and against
Nicaragua (footnote 36 above), pp. 117–118, para. 226; and GabˇcíkovoNagymaros
Project (footnote 27 above), p. 54, para. 78.
60 See footnote 42 above.
61 Cf. Yearbook ... 1973, vol. II, p. 179, document A/9010/Rev.1,
paragraph (1) of the commentary to article 3.
	 State responsibility	 35
possible standards. Establishing these is a matter for the
interpretation and application of the primary rules engaged
in the given case.
(4)  Conduct attributable to the State can consist of actions
or omissions. Cases in which the international
responsibility of a State has been invoked on the basis of
an omission are at least as numerous as those based on
positive acts, and no difference in principle exists between
the two. Moreover, it may be difficult to isolate an “omission”
from the surrounding circumstances which are relevant
to the determination of responsibility. For example,
in the Corfu Channel case, ICJ held that it was a sufficient
basis forAlbanian responsibility that it knew, or must have
known, of the presence of the mines in its territorial waters
and did nothing to warn third States of their presence.62
In the United States Diplomatic and Consular Staff in
Tehran case, the Court concluded that the responsibility
of the Islamic Republic of Iran was entailed by the “inaction”
of its authorities which “failed to take appropriate
steps”, in circumstances where such steps were evidently
called for.63 In other cases it may be the combination of
an action and an omission which is the basis for respon-
sibility.64
(5)  For particular conduct to be characterized as an internationally
wrongful act, it must first be attributable
to the State. The State is a real organized entity, a legal
person with full authority to act under international law.
But to recognize this is not to deny the elementary fact
that the State cannot act of itself. An “act of the State”
must involve some action or omission by a human being
or group: “States can act only by and through their agents
and representatives.”65 The question is which persons
should be considered as acting on behalf of the State, i.e.
what constitutes an “act of the State” for the purposes of
State responsibility.
(6)  In speaking of attribution to the State what is meant
is the State as a subject of international law. Under many
legal systems, the State organs consist of different legal
persons (ministries or other legal entities), which are regarded
as having distinct rights and obligations for which
they alone can be sued and are responsible. For the purposes
of the international law of State responsibility
the position is different. The State is treated as a unity,
consistent with its recognition as a single legal person in
international law. In this as in other respects the attribution
of conduct to the State is necessarily a normative operation.
What is crucial is that a given event is sufficiently
62 Corfu Channel, Merits (see footnote 35 above), pp. 22–23.
63 United States Diplomatic and Consular Staff in Tehran (see
footnote 59 above), pp. 31–32, paras. 63 and 67. See also Velásquez
Rodríguez v. Honduras case, Inter-American Court of Human Rights,
Series C, No. 4, para. 170 (1988): “under international law a State is
responsible for the acts of its agents undertaken in their official capacity
and for their omissions”; and Affaire relative à l’acquisition de la
nationalité polonaise, UNRIAA, vol. I (Sales No. 1948.V.2), p. 401, at
p. 425 (1924).
64 For example, under article 4 of the Convention relative to the
Laying of Automatic Submarine Contact Mines (Hague Convention
VIII of 18 October 1907), a neutral Power which lays mines off its
coasts but omits to give the required notice to other States parties would
be responsible accordingly.
65 German Settlers in Poland, Advisory Opinion, 1923, P.C.I.J.,
Series B, No. 6, p. 22.
connected to conduct (whether an act or omission) which
is attributable to the State under one or other of the rules
set out in chapter II.
(7)  The second condition for the existence of an internationally
wrongful act of the State is that the conduct
attributable to the State should constitute a breach of an
international obligation of that State. The terminology of
breach of an international obligation of the State is long
established and is used to cover both treaty and non-treaty
obligations. In its judgment on jurisdiction in the Factory
at Chorzów case, PCIJ used the words “breach of
an engagement”.66 It employed the same expression in its
subsequent judgment on the merits.67 ICJ referred explicitly
to these words in the Reparation for Injuries case.68
The arbitral tribunal in the “Rainbow Warrior” affair referred
to “any violation by a State of any obligation”.69
In practice, terms such as “non-execution of international
obligations”, “acts incompatible with international obligations”,
“violation of an international obligation” or
“breach of an engagement” are also used.70 All these formulations
have essentially the same meaning. The phrase
preferred in the articles is “breach of an international obligation”
corresponding as it does to the language of Article
36, paragraph 2 (c), of the ICJ Statute.
(8)  In international law the idea of breach of an obligation
has often been equated with conduct contrary to the
rights of others. PCIJ spoke of an act “contrary to the treaty
right[s] of another State” in its judgment in the Phosphates
in Morocco case.71 That case concerned a limited
multilateral treaty which dealt with the mutual rights and
duties of the parties, but some have considered the correlation
of obligations and rights as a general feature of
international law: there are no international obligations of
a subject of international law which are not matched by an
international right of another subject or subjects, or even
of the totality of the other subjects (the international community
as a whole). But different incidents may attach to
a right which is held in common by all other subjects of
international law, as compared with a specific right of a
given State or States. Different States may be beneficiaries
of an obligation in different ways, or may have different
interests in respect of its performance. Multilateral
obligations may thus differ from bilateral ones, in view of
the diversity of legal rules and institutions and the wide
variety of interests sought to be protected by them. But
whether any obligation has been breached still raises the
two basic questions identified in article 2, and this is so
whatever the character or provenance of the obligation
breached. It is a separate question who may invoke the responsibility
arising from the breach of an obligation: this
question is dealt with in Part Three.72
66 Factory at Chorzów, Jurisdiction (see footnote 34 above).
67 Factory at Chorzów, Merits (ibid.).
68 Reparation for Injuries (see footnote 38 above), p. 184.
69 “Rainbow Warrior” (see footnote 46 above), p. 251, para. 75.
70 At the Conference for the Codification of International Law, held
at The Hague in 1930, the term “any failure ... to carry out the international
obligations of the State” was adopted (see Yearbook ... 1956,
vol. II, p. 225, document A/CN.4/96, annex 3, article 1).
71 See footnote 34 above.
72 See also article 33, paragraph 2, and commentary.
36	 Report of the International Law Commission on the work of its fifty-third session
(9)  Thus there is no exception to the principle stated in
article 2 that there are two necessary conditions for an
internationally wrongful act—conduct attributable to
the State under international law and the breach by that
conduct of an international obligation of the State. The
question is whether those two necessary conditions are
also sufficient. It is sometimes said that international responsibility
is not engaged by conduct of a State in disregard
of its obligations unless some further element exists,
in particular, “damage” to another State. But whether such
elements are required depends on the content of the primary
obligation, and there is no general rule in this respect.
For example, the obligation under a treaty to enact a uniform
law is breached by the failure to enact the law, and
it is not necessary for another State party to point to any
specific damage it has suffered by reason of that failure.
Whether a particular obligation is breached forthwith
upon a failure to act on the part of the responsible State,
or whether some further event must occur, depends on the
content and interpretation of the primary obligation and
cannot be determined in the abstract.73
(10)  A related question is whether fault constitutes a
necessary element of the internationally wrongful act of a
State. This is certainly not the case if by “fault” one understands
the existence, for example, of an intention to harm.
In the absence of any specific requirement of a mental
element in terms of the primary obligation, it is only
the act of a State that matters, independently of any
intention.
(11)  Article 2 introduces and places in the necessary
legal context the questions dealt with in subsequent
chapters of Part One. Subparagraph (a)—which states
that conduct attributable to the State under international
law is necessary for there to be an internationally wrongful
act—corresponds to chapter II, while chapter IV deals
with the specific cases where one State is responsible for
the internationally wrongful act of another State. Subparagraph
(b)—which states that such conduct must
constitute a breach of an international obligation—corresponds
to the general principles stated in chapter III,
while chapter V deals with cases where the wrongfulness
of conduct, which would otherwise be a breach of an
obligation, is precluded.
(12)  In subparagraph (a), the term “attribution” is used
to denote the operation of attaching a given action or omission
to a State. In international practice and judicial decisions,
the term “imputation” is also used.74 But the term
“attribution” avoids any suggestion that the legal process
of connecting conduct to the State is a fiction, or that the
conduct in question is “really” that of someone else.
73 For examples of analysis of different obligations, see United
States Diplomatic and Consular Staff in Tehran (footnote 59 above),
pp. 30–33, paras. 62–68; “Rainbow Warrior” (footnote 46 above),
pp. 266–267, paras. 107–110; and WTO, Report of the Panel, United
States–Sections 301–310 of the Trade Act of 1974 (WT/DS152/R),
22 December 1999, paras. 7.41 et seq.
74 See, e.g., United States Diplomatic and Consular Staff in Tehran
(footnote 59 above), p. 29, paras. 56 and 58; and Military and Paramilitary
Activities in and against Nicaragua (footnote 36 above), p. 51,
para. 86.
(13)  In subparagraph (b), reference is made to the breach
of an international obligation rather than a rule or a norm
of international law. What matters for these purposes is
not simply the existence of a rule but its application in the
specific case to the responsible State. The term “obligation”
is commonly used in international judicial decisions
and practice and in the literature to cover all the possibilities.
The reference to an “obligation” is limited to an obligation
under international law, a matter further clarified
in article 3.
Article 3.  Characterization of an act of a State
as internationally wrongful
The characterization of an act of a State as internationally
wrongful is governed by international law.
Such characterization is not affected by the characterization
of the same act as lawful by internal law.
Commentary
(1)  Article 3 makes explicit a principle already implicit
in article 2, namely that the characterization of a given
act as internationally wrongful is independent of its characterization
as lawful under the internal law of the State
concerned. There are two elements to this. First, an act of
a State cannot be characterized as internationally wrongful
unless it constitutes a breach of an international obligation,
even if it violates a provision of the State’s own
law. Secondly and most importantly, a State cannot, by
pleading that its conduct conforms to the provisions of its
internal law, escape the characterization of that conduct as
wrongful by international law. An act of a State must be
characterized as internationally wrongful if it constitutes a
breach of an international obligation, even if the act does
not contravene the State’s internal law—even if, under
that law, the State was actually bound to act in that way.
(2)  As to the first of these elements, perhaps the clearest
judicial decision is that of PCIJ in the Treatment of
Polish Nationals case.75 The Court denied the Polish
Government the right to submit to organs of the League
of Nations questions concerning the application to Polish
nationals of certain provisions of the Constitution of the
Free City of Danzig, on the ground that:
according to generally accepted principles, a State cannot rely, as
against another State, on the provisions of the latter’s Constitution, but
only on international law and international obligations duly accepted
... [C]onversely, a State cannot adduce as against another State its own
Constitution with a view to evading obligations incumbent upon it under
international law or treaties in force ...The application of the Danzig
Constitution may ... result in the violation of an international obligation
incumbent on Danzig towards Poland, whether under treaty stipulations
or under general international law ... However, in cases of such a nature,
it is not the Constitution and other laws, as such, but the international
obligation that gives rise to the responsibility of the Free City.76
(3)  That conformity with the provisions of internal
law in no way precludes conduct being characterized as
internationally wrongful is equally well settled. Interna-
75 Treatment of Polish Nationals and Other Persons of Polish Origin
or Speech in the Danzig Territory, Advisory Opinion, 1932, P.C.I.J.,
Series A/B, No. 44, p. 4.
76 Ibid., pp. 24–25. See also “Lotus”, Judgment No. 9, 1927, P.C.I.J.,
Series A, No. 10, p. 24.
	 State responsibility	 37
tional judicial decisions leave no doubt on that subject. In
particular, PCIJ expressly recognized the principle in its
first judgment, in the S.S. “Wimbledon” case. The Court
rejected the argument of the German Government that the
passage of the ship through the Kiel Canal would have
constituted a violation of the German neutrality orders,
observing that:
a neutrality order, issued by an individual State, could not prevail over
the provisions of the Treaty of Peace. ... under Article 380 of the Treaty
of Versailles, it was [Germany’s] definite duty to allow [the passage
of the Wimbledon through the Kiel Canal]. She could not advance her
neutrality orders against the obligations which she had accepted under
this Article.77
The principle was reaffirmed many times:
it is a generally accepted principle of international law that in the relations
between Powers who are contracting Parties to a treaty, the provisions
of municipal law cannot prevail over those of the treaty;78
... it is certain that France cannot rely on her own legislation to limit the
scope of her international obligations;79
... a State cannot adduce as against another State its own Constitution
with a view to evading obligations incumbent upon it under international
law or treaties in force.80
A different facet of the same principle was also affirmed in
the advisory opinions on Exchange of Greek and Turkish
Populations81 and Jurisdiction of the Courts of Danzig.82
(4)  ICJ has often referred to and applied the principle.83
For example, in the Reparation for Injuries case, it noted
that “[a]s the claim is based on the breach of an international
obligation on the part of the Member held responsible
… the Member cannot contend that this obligation is
governed by municipal law”.84 In the ELSI case, a Chamber
of the Court emphasized this rule, stating that:
Compliance with municipal law and compliance with the provisions of
a treaty are different questions. What is a breach of treaty may be lawful
in the municipal law and what is unlawful in the municipal law may be
wholly innocent of violation of a treaty provision. Even had the Prefect
held the requisition to be entirely justified in Italian law, this would not
exclude the possibility that it was a violation of the FCN Treaty.85
Conversely, as the Chamber explained:
the fact that an act of a public authority may have been unlawful in
municipal law does not necessarily mean that that act was unlawful in
77 S.S. “Wimbledon” (see footnote 34 above), pp. 29–30.
78 Greco-Bulgarian “Communities”, Advisory Opinion, 1930,
P.C.I.J., Series B, No. 17, p. 32.
79 Free Zones of Upper Savoy and the District of Gex, Order of
6 December 1930, P.C.I.J., Series A, No. 24, p. 12; and ibid., Judgment,
1932, P.C.I.J., Series A/B, No. 46, p. 96, at p. 167.
80 Treatment of Polish Nationals (see footnote 75 above), p. 24.
81 Exchange of Greek and Turkish Populations, Advisory Opinion,
1925, P.C.I.J., Series B, No. 10, p. 20.
82 Jurisdiction of the Courts of Danzig, Advisory Opinion, 1928,
P.C.I.J., Series B, No. 15, pp. 26–27. See also the observations of
Lord Finlay in Acquisition of Polish Nationality, Advisory Opinion,
1923, P.C.I.J., Series B, No. 7, p. 26.
83 See Fisheries, Judgment, I.C.J. Reports 1951, p. 116, at p. 132;
Nottebohm, Preliminary Objection, Judgment, I.C.J. Reports 1953,
p. 111, at p. 123; Application of the Convention of 1902 Governing the
Guardianship of Infants, Judgment, I.C.J. Reports 1958, p. 55, at p. 67;
and Applicability of the Obligation to Arbitrate under Section 21 of
the United Nations Headquarters Agreement of 26 June 1947, Advisory
Opinion, I.C.J. Reports 1988, p. 12, at pp. 34–35, para. 57.
84 Reparation for Injuries (see footnote 38 above), at p. 180.
85 Elettronica Sicula S.p.A. (ELSI), Judgment, I.C.J. Reports 1989,
p. 15, at p. 51, para. 73.
international law, as a breach of treaty or otherwise. A finding of the
local courts that an act was unlawful may well be relevant to an argument
that it was also arbitrary; but by itself, and without more, unlawfulness
cannot be said to amount to arbitrariness … Nor does it follow from a
finding by a municipal court that an act was unjustified, or unreasonable,
or arbitrary, that that act is necessarily to be classed as arbitrary in
international law, though the qualification given to the impugned act by
a municipal authority may be a valuable indication.86
The principle has also been applied by numerous arbitral
tribunals.87
(5)  The principle was expressly endorsed in the work undertaken
under the auspices of the League of Nations on
the codification of State responsibility,88 as well as in the
work undertaken under the auspices of the United Nations
on the codification of the rights and duties of States and
the law of treaties. The Commission’s draft Declaration on
Rights and Duties of States, article 13, provided that:
Every State has the duty to carry out in good faith its obligations arising
from treaties and other sources of international law, and it may not
invoke provisions in its constitution or its laws as an excuse for failure
to perform this duty.89
(6)  Similarly this principle was endorsed in the 1969
Vienna Convention, article 27 of which provides that:
A party may not invoke the provisions of its internal law as justification
for its failure to perform a treaty. This rule is without prejudice to
article 46.90
86 Ibid., p. 74, para. 124.
87 See, e.g., the Geneva Arbitration (the “Alabama” case), in Moore,
History and Digest, vol. IV, p. 4144, at pp. 4156 and 4157 (1872);
Norwegian Shipowners’ Claims (Norway v. United States of America),
UNRIAA, vol. I (Sales No. 1948.V.2), p. 307, at p. 331 (1922); AguilarAmory
and Royal Bank of Canada Claims (Tinoco case) (Great Britain
v. Costa Rica), ibid., p. 369, at p. 386 (1923); Shufeldt Claim, ibid.,
vol. II (Sales No. 1949.V.1), p. 1079, at p. 1098 (“it is a settled principle
of international law that a sovereign can not be permitted to set up one
of his own municipal laws as a bar to a claim by a sovereign for a wrong
done to the latter’s subject”) (1930); Wollemborg Case, ibid., vol. XIV
(Sales No. 65.V.4), p. 283, at p. 289 (1956); and Flegenheimer, ibid.,
p. 327, at p. 360 (1958).
88 In point I of the request for information on State responsibility sent
to States by the Preparatory Committee for the 1930 Hague Conference
it was stated:
“In particular, a State cannot escape its responsibility under international
law, if such responsibility exists, by appealing to the provisions
of its municipal law.”
In their replies, States agreed expressly or implicitly with this principle
(see League of Nations, Conference for the Codification of
International Law, Bases of Discussion for the Conference drawn up
by the Preparatory Committee, vol. III: Responsibility of States for
Damage caused in theirTerritory to the Person or Property of Foreigners
(document C.75.M.69.1929.V), p. 16). During the debate at the 1930
Hague Conference, States expressed general approval of the idea embodied
in point I and the Third Committee of the Conference adopted
article 5 to the effect that “A State cannot avoid international responsibility
by invoking the state of its municipal law” (document C.351(c)
M.145(c).1930.V; reproduced in Yearbook ... 1956, vol. II, p. 225,	
document A/CN.4/96, annex 3).
89 See General Assembly resolution 375 (IV) of 6 December 1949,
annex. For the debate in the Commission, see Yearbook ... 1949,
pp. 105–106, 150 and 171. For the debate in the Assembly, see Official
Records of the General Assembly, Fourth Session, Sixth Committee,
168th–173rd meetings, 18–25 October 1949; 175th–183rd meetings,
27 October–3 November 1949; and ibid., Fourth Session, Plenary
Meetings, 270th meeting, 6 December 1949.
90 Article 46 of the Convention provides for the invocation of provisions
of internal law regarding competence to conclude treaties in
limited circumstances, viz., where the violation of such provisions
“was manifest and concerned a rule of … internal law of fundamental
importance”.
38	 Report of the International Law Commission on the work of its fifty-third session
(7)  The rule that the characterization of conduct as
unlawful in international law cannot be affected by the
characterization of the same act as lawful in internal law
makes no exception for cases where rules of international
law require a State to conform to the provisions of its internal
law, for instance by applying to aliens the same legal
treatment as to nationals. It is true that in such a case,
compliance with internal law is relevant to the question of
international responsibility. But this is because the rule of
international law makes it relevant, e.g. by incorporating
the standard of compliance with internal law as the applicable
international standard or as an aspect of it. Especially
in the fields of injury to aliens and their property and
of human rights, the content and application of internal
law will often be relevant to the question of international
responsibility. In every case it will be seen on analysis that
either the provisions of internal law are relevant as facts in
applying the applicable international standard, or else that
they are actually incorporated in some form, conditionally
or unconditionally, into that standard.
(8)  As regards the wording of the rule, the formulation
“The municipal law of a State cannot be invoked to prevent
an act of that State from being characterized as wrongful
in international law”, which is similar to article 5 of the
draft adopted on first reading at the 1930 Hague Conference
and also to article 27 of the 1969 Vienna Convention,
has the merit of making it clear that States cannot use their
internal law as a means of escaping international responsibility.
On the other hand, such a formulation sounds like
a rule of procedure and is inappropriate for a statement
of principle. Issues of the invocation of responsibility belong
to Part Three, whereas this principle addresses the
underlying question of the origin of responsibility. In addition,
there are many cases where issues of internal law
are relevant to the existence or otherwise of responsibility.
As already noted, in such cases it is international law
which determines the scope and limits of any reference to
internal law. This element is best reflected by saying, first,
that the characterization of State conduct as internationally
wrongful is governed by international law, and secondly by
affirming that conduct which is characterized as wrongful
under international law cannot be excused by reference to
the legality of that conduct under internal law.
(9)  As to terminology, in the English version the term
“internal law” is preferred to “municipal law”, because
the latter is sometimes used in a narrower sense, and because
the 1969 Vienna Convention speaks of “internal
law”. Still less would it be appropriate to use the term
“national law”, which in some legal systems refers only to
the laws emanating from the central legislature, as distinct
from provincial, cantonal or local authorities. The principle
in article 3 applies to all laws and regulations adopted
within the framework of the State, by whatever authority
and at whatever level.91 In the French version the expression
droit interne is preferred to législation interne and
loi interne, because it covers all provisions of the internal
legal order, whether written or unwritten and whether
they take the form of constitutional or legislative rules,
administrative decrees or judicial decisions.
91 Cf. LaGrand (Germany v. United States of America), Provisional
Measures, Order of 3 March 1999, I.C.J. Reports 1999, p. 9, at p. 16,
para. 28.
Chapter II
ATTRIBUTION OF CONDUCT TO A STATE
Commentary
(1)  In accordance with article 2, one of the essential conditions
for the international responsibility of a State is that
the conduct in question is attributable to the State under
international law. Chapter II defines the circumstances in
which such attribution is justified, i.e. when conduct consisting
of an act or omission or a series of acts or omissions
is to be considered as the conduct of the State.
(2)  In theory, the conduct of all human beings, corporations
or collectivities linked to the State by nationality,
habitual residence or incorporation might be attributed
to the State, whether or not they have any connection to
the Government. In international law, such an approach
is avoided, both with a view to limiting responsibility to
conduct which engages the State as an organization, and
also so as to recognize the autonomy of persons acting on
their own account and not at the instigation of a public
authority. Thus, the general rule is that the only conduct
attributed to the State at the international level is that of its
organs of government, or of others who have acted under
the direction, instigation or control of those organs, i.e. as
agents of the State.92
(3)  As a corollary, the conduct of private persons is not
as such attributable to the State. This was established, for
example, in the Tellini case of 1923. The Council of the
League of Nations referred to a Special Commission of
Jurists certain questions arising from an incident between
Italy and Greece.93 This involved the assassination on
Greek territory of the Chairman and several members of
an international commission entrusted with the task of delimiting
the Greek-Albanian border. In reply to question
five, the Commission stated that:
The responsibility of a State is only involved by the commission in its
territory of a political crime against the persons of foreigners if the State
has neglected to take all reasonable measures for the prevention of the
crime and the pursuit, arrest and bringing to justice of the criminal.94
(4)  The attribution of conduct to the State as a subject
of international law is based on criteria determined by international
law and not on the mere recognition of a link
92 See, e.g., I. Brownlie, System of the Law of Nations: State 
Responsibility, Part I (Oxford, Clarendon Press, 1983), pp. 132–
166; D. D. Caron, “The basis of responsibility: attribution and other
trans-substantive rules”, The Iran-United States Claims Tribunal: Its 
Contribution to the Law of State Responsibility, R. B. Lillich and
D. B. Magraw, eds. (Irvington-on-Hudson, N.Y., Transnational, 1998),
p. 109; L. Condorelli, “L’imputation à l’État d’un fait internationalement
illicite : solutions classiques et nouvelles tendances”, Recueil
des cours…, 1984–VI (Dordrecht, Martinus Nijhoff, 1988), vol. 189,
p. 9; H. Dipla, La responsabilité de l’État pour violation des 
droits de l’homme: problèmes d’imputation (Paris, Pedone, 1994);
A. V. Freeman, “Responsibility of States for unlawful acts of their
armed forces”, Recueil des cours…, 1955–II (Leiden, Sijthoff, 1956),
vol. 88, p. 261; and F. Przetacznik, “The international responsibility of
States for the unauthorized acts of their organs”, Sri Lanka Journal of
International Law, vol. 1 (June 1989), p. 151.
93 League of Nations, Official Journal, 4th Year, No. 11 (November
1923), p. 1349.
94 Ibid., 5thYear, No. 4 (April 1924), p. 524. See also the Janes case,
UNRIAA, vol. IV (Sales No. 1951.V.1), p. 82 (1925).
	 State responsibility	 39
of factual causality. As a normative operation, attribution
must be clearly distinguished from the characterization
of conduct as internationally wrongful. Its concern is to
establish that there is an act of the State for the purposes
of responsibility. To show that conduct is attributable to
the State says nothing, as such, about the legality or otherwise
of that conduct, and rules of attribution should not
be formulated in terms which imply otherwise. But the
different rules of attribution stated in chapter II have a
cumulative effect, such that a State may be responsible
for the effects of the conduct of private parties, if it failed
to take necessary measures to prevent those effects. For
example, a receiving State is not responsible, as such, for
the acts of private individuals in seizing an embassy, but
it will be responsible if it fails to take all necessary steps
to protect the embassy from seizure, or to regain control
over it.95 In this respect there is often a close link between
the basis of attribution and the particular obligation said
to have been breached, even though the two elements are
analytically distinct.
(5)  The question of attribution of conduct to the State for
the purposes of responsibility is to be distinguished from
other international law processes by which particular organs
are authorized to enter into commitments on behalf
of the State. Thus the Head of State or Government or the
minister of foreign affairs is regarded as having authority
to represent the State without any need to produce full
powers.96 Such rules have nothing to do with attribution
for the purposes of State responsibility. In principle, the
State’s responsibility is engaged by conduct incompatible
with its international obligations, irrespective of the level
of administration or government at which the conduct occurs.97
Thus, the rules concerning attribution set out in
this chapter are formulated for this particular purpose,
and not for other purposes for which it may be necessary
to define the State or its Government.
(6)  In determining what constitutes an organ of a State
for the purposes of responsibility, the internal law and
practice of each State are of prime importance. The structure
of the State and the functions of its organs are not,
in general, governed by international law. It is a matter
for each State to decide how its administration is to be
structured and which functions are to be assumed by government.
But while the State remains free to determine its
internal structure and functions through its own law and
practice, international law has a distinct role. For example,
the conduct of certain institutions performing public
functions and exercising public powers (e.g. the police) is
attributed to the State even if those institutions are regarded
in internal law as autonomous and independent of the
executive government.98 Conduct engaged in by organs
of the State in excess of their competence may also be
95 See United States Diplomatic and Consular Staff in Tehran
(footnote 59 above).
96 See articles 7, 8, 46 and 47 of the 1969 Vienna Convention.
97 The point was emphasized, in the context of federal States, in
LaGrand (see footnote 91 above). It is not of course limited to federal
States. See further article 5 and commentary.
98 See paragraph (11) of the commentary to article 4; see also article
5 and commentary.
attributed to the State under international law, whatever
the position may be under internal law.99
(7)  The purpose of this chapter is to specify the conditions
under which conduct is attributed to the State as a
subject of international law for the purposes of determining
its international responsibility. Conduct is thereby attributed
to the State as a subject of international law and
not as a subject of internal law. In internal law, it is common
for the “State” to be subdivided into a series of distinct
legal entities. For example, ministries, departments,
component units of all kinds, State commissions or corporations
may have separate legal personality under internal
law, with separate accounts and separate liabilities. But
international law does not permit a State to escape its international
responsibilities by a mere process of internal
subdivision. The State as a subject of international law is
held responsible for the conduct of all the organs, instrumentalities
and officials which form part of its organization
and act in that capacity, whether or not they have
separate legal personality under its internal law.
(8)  Chapter II consists of eight articles. Article 4 states
the basic rule attributing to the State the conduct of its
organs. Article 5 deals with conduct of entities empowered
to exercise the governmental authority of a State, and
article 6 deals with the special case where an organ of
one State is placed at the disposal of another State and
empowered to exercise the governmental authority of that
State. Article 7 makes it clear that the conduct of organs
or entities empowered to exercise governmental authority
is attributable to the State even if it was carried out
outside the authority of the organ or person concerned or
contrary to instructions. Articles 8 to 11 then deal with
certain additional cases where conduct, not that of a State
organ or entity, is nonetheless attributed to the State in
international law. Article 8 deals with conduct carried out
on the instructions of a State organ or under its direction
or control. Article 9 deals with certain conduct involving
elements of governmental authority, carried out in the absence
of the official authorities. Article 10 concerns the
special case of responsibility in defined circumstances for
the conduct of insurrectional movements. Article 11 deals
with conduct not attributable to the State under one of the
earlier articles which is nonetheless adopted by the State,
expressly or by conduct, as its own.
(9)  These rules are cumulative but they are also limitative.
In the absence of a specific undertaking or guarantee
(which would be a lex specialis100), a State is not responsible
for the conduct of persons or entities in circumstances
not covered by this chapter. As the Iran-United States
Claims Tribunal has affirmed, “in order to attribute an act
to the State, it is necessary to identify with reasonable
certainty the actors and their association with the State”.101
This follows already from the provisions of article 2.
99 See article 7 and commentary.
100 See article 55 and commentary.
101 Kenneth P. Yeager v. The Islamic Republic of Iran, Iran-U.S.
C.T.R., vol. 17 , p. 92, at pp. 101–102 (1987).
40	 Report of the International Law Commission on the work of its fifty-third session
Article 4.  Conduct of organs of a State
1.  The conduct of any State organ shall be considered
an act of that State under international law,
whether the organ exercises legislative, executive, judicial
or any other functions, whatever position it holds
in the organization of the State, and whatever its character
as an organ of the central Government or of a
territorial unit of the State.
2.  An organ includes any person or entity which
has that status in accordance with the internal law of
the State.
Commentary
(1)  Paragraph 1 of article 4 states the first principle of
attribution for the purposes of State responsibility in international
law—that the conduct of an organ of the State
is attributable to that State. The reference to a “State organ”
covers all the individual or collective entities which
make up the organization of the State and act on its behalf.
It includes an organ of any territorial governmental entity
within the State on the same basis as the central governmental
organs of that State: this is made clear by the final
phrase.
(2)  Certain acts of individuals or entities which do not
have the status of organs of the State may be attributed to
the State in international law, and these cases are dealt with
in later articles of this chapter. But the rule is nonetheless
a point of departure. It defines the core cases of attribution,
and it is a starting point for other cases. For example,
under article 8 conduct which is authorized by the State,
so as to be attributable to it, must have been authorized by
an organ of the State, either directly or indirectly.
(3)  That the State is responsible for the conduct of its
own organs, acting in that capacity, has long been recognized
in international judicial decisions. In the Moses
case, for example, a decision of a Mexico-United States
Mixed Claims Commission, Umpire Lieber said: “An
officer or person in authority represents pro tanto his government,
which in an international sense is the aggregate
of all officers and men in authority.”102 There have been
many statements of the principle since then.103
(4)  The replies by Governments to the Preparatory Committee
for the 1930 Hague Conference104 were unanimously
of the view that the actions or omissions of organs
of the State must be attributed to it. The Third Committee
of the Conference adopted unanimously on first reading
an article 1, which provided that international responsibility
shall be incurred by a State as a consequence of “any
102 Moore, History and Digest, vol. III, p. 3127, at p. 3129 (1871).
103 See, e.g., Claims of Italian Nationals (footnote 41 above);
Salvador Commercial Company, UNRIAA, vol. XV (Sales No. 66.V.3),
p. 455, at p. 477 (1902); and Finnish Shipowners (Great Britain/Finland),
ibid., vol. III (Sales No. 1949.V.2), p. 1479, at p. 1501 (1934).
104 League of Nations, Conference for the Codification of International
Law, Bases of Discussion … (see footnote 88 above), pp. 25, 41
and 52; Supplement to Volume III: Replies made by the Governments
to the Schedule of Points; Replies of Canada and the United States of
America (document C.75(a)M.69(a).1929.V), pp. 2–3 and 6.
failure on the part of its organs to carry out the international
obligations of the State”.105
(5)  The principle of the unity of the State entails that the
acts or omissions of all its organs should be regarded as
acts or omissions of the State for the purposes of international
responsibility. It goes without saying that there is
no category of organs specially designated for the commission
of internationally wrongful acts, and virtually any
State organ may be the author of such an act. The diversity
of international obligations does not permit any general
distinction between organs which can commit internationally
wrongful acts and those which cannot. This is reflected
in the closing words of paragraph 1, which clearly
reflect the rule of international law in the matter.
(6)  Thus, the reference to a State organ in article 4 is intended
in the most general sense. It is not limited to the organs
of the central government, to officials at a high level
or to persons with responsibility for the external relations
of the State. It extends to organs of government of whatever
kind or classification, exercising whatever functions,
and at whatever level in the hierarchy, including those at
provincial or even local level. No distinction is made for
this purpose between legislative, executive or judicial organs.
Thus, in the Salvador Commercial Company case,
the tribunal said that:
a State is responsible for the acts of its rulers, whether they belong to
the legislative, executive, or judicial department of the Government, so
far as the acts are done in their official capacity.106
ICJ has also confirmed the rule in categorical terms. In
Difference Relating to Immunity from Legal Process of a
Special Rapporteur of the Commission on Human Rights,
it said:
According to a well-established rule of international law, the conduct of
any organ of a State must be regarded as an act of that State. This rule
… is of a customary character.107
In that case the Court was principally concerned with
decisions of State courts, but the same principle applies to
legislative and executive acts.108 As PCIJ said in Certain
German Interests in Polish Upper Silesia (Merits):
105 Reproduced in Yearbook ... 1956, vol. II, p. 225, document
A/CN.4/96, annex 3.
106 See Salvador Commercial Company (footnote 103 above).
See also Chattin case, UNRIAA, vol. IV (Sales No. 1951.V.1), p. 282,
at pp. 285–286 (1927); and Dispute concerning the interpretation of
article 79 of the Treaty of Peace, ibid., vol. XIII (Sales No. 64.V.3),
p. 389, at p. 438 (1955).
107 Difference Relating to Immunity from Legal Process of a 
Special Rapporteur of the Commission on Human Rights (see footnote
56 above), p. 87, para. 62, referring to the draft articles on State responsibility,
article 6, now embodied in article 4.
108 As to legislative acts, see, e.g., German Settlers in Poland 
(footnote65above),atpp.35–36;TreatmentofPolishNationals(footnote
75 above), at pp. 24–25; Phosphates in Morocco (footnote 34 above),
at pp. 25–26; and Rights of Nationals of the United States of America
in Morocco, Judgment, I.C.J. Reports 1952, p. 176, at pp. 193–194.
As to executive acts, see, e.g., Military and Paramilitary Activities in
and against Nicaragua (footnote 36 above); and ELSI (footnote 85
above). As to judicial acts, see, e.g., “Lotus” (footnote 76 above);
Jurisdiction of the Courts of Danzig (footnote 82 above); and Ambatielos,
Merits, Judgment, I.C.J. Reports 1953, p. 10, at pp. 21–22. In some
cases, the conduct in question may involve both executive and judicial
acts; see, e.g., Application of the Convention of 1902 (footnote 83 above)
at p. 65.
	 State responsibility	 41
From the standpoint of International Law and of the Court which is its
organ, municipal laws ... express the will and constitute the activities
of States, in the same manner as do legal decisions or administrative
measures.109
Thus, article 4 covers organs, whether they exercise
“legislative, executive, judicial or any other functions”.
This language allows for the fact that the principle of the
separation of powers is not followed in any uniform way,
and that many organs exercise some combination of public
powers of a legislative, executive or judicial character.
Moreover, the term is one of extension, not limitation,
as is made clear by the words “or any other functions”.110
It is irrelevant for the purposes of attribution that the conduct
of a State organ may be classified as “commercial”
or as acta iure gestionis. Of course, the breach by a State
of a contract does not as such entail a breach of international
law.111 Something further is required before international
law becomes relevant, such as a denial of justice
by the courts of the State in proceedings brought by the
other contracting party. But the entry into or breach of a
contract by a State organ is nonetheless an act of the State
for the purposes of article 4,112 and it might in certain circumstances
amount to an internationally wrongful act.113
(7)  Nor is any distinction made at the level of principle
between the acts of “superior” and “subordinate” officials,
provided they are acting in their official capacity.
This is expressed in the phrase “whatever position it holds
in the organization of the State” in article 4. No doubt
lower-level officials may have a more restricted scope of
activity and they may not be able to make final decisions.
But conduct carried out by them in their official capacity
is nonetheless attributable to the State for the purposes of
article 4. Mixed commissions after the Second World War
often had to consider the conduct of minor organs of the
State, such as administrators of enemy property, mayors
and police officers, and consistently treated the acts of
such persons as attributable to the State.114
109 Certain German Interests in Polish Upper Silesia, Merits, Judgment
No. 7, 1926, P.C.I.J., Series A, No. 7, at p. 19.
110 These functions might involve, e.g. the giving of administrative
guidance to the private sector. Whether such guidance involves a breach
of an international obligation may be an issue, but as “guidance” it is
clearly attributable to the State. See, e.g., GATT, Report of the Panel,
Japan–Trade in Semi-conductors, 24 March 1988, paras. 110–111;
and WTO, Report of the Panel, Japan–Measures affecting Consumer
Photographic Film and Paper (WT/DS44/R), paras. 10.12–10.16.
111 See article 3 and commentary.
112 See, e.g., the decisions of the European Court of Human Rights
in Swedish Engine Drivers’ Union v. Sweden, Eur. Court H.R., Series
A, No. 20 (1976), at p. 14; and Schmidt and Dahlström v. Sweden, ibid.,
Series A, No. 21 (1976), at p. 15.
113 The irrelevance of the classification of the acts of State organs
as iure imperii or iure gestionis was affirmed by all those members of
the Sixth Committee who responded to a specific question on this issue
from the Commission (see Yearbook ... 1998, vol. II (Part Two), p. 17,
para. 35).
114 See, e.g., the Currie case, UNRIAA, vol. XIV (Sales No.
65.V.4), p. 21, at p. 24 (1954); Dispute concerning the interpretation
of article 79 (footnote 106 above), at pp. 431–432; and Mossé case,
UNRIAA, vol. XIII (Sales No. 64.V.3), p. 486, at pp. 492–493 (1953).
For earlier decisions, see the Roper case, ibid., vol. IV (Sales No. 1951.
V.1), p. 145 (1927); Massey, ibid., p. 155 (1927); Way, ibid., p. 391, at
p. 400 (1928); and Baldwin, ibid., vol. VI (Sales No. 1955.V.3), p. 328
(1933). Cf. the consideration of the requisition of a plant by the Mayor
of Palermo in ELSI (see footnote 85 above), e.g. at p. 50, para. 70.
(8)  Likewise, the principle in article 4 applies equally to
organs of the central government and to those of regional
or local units. This principle has long been recognized.
For example, the Franco-Italian Conciliation Commission
in the Heirs of the Duc de Guise case said:
For the purposes of reaching a decision in the present case it matters
little that the decree of 29 August 1947 was not enacted by the Italian
State but by the region of Sicily. For the Italian State is responsible
for implementing the Peace Treaty, even for Sicily, notwithstanding the
autonomy granted to Sicily in internal relations under the public law of
the Italian Republic.115
This principle was strongly supported during the preparatory
work for the 1930 Hague Conference. Governments
were expressly asked whether the State became responsible
as a result of “[a]cts or omissions of bodies exercising
public functions of a legislative or executive character
(communes, provinces, etc.)”. All answered in the
affirmative.116
(9)  It does not matter for this purpose whether the territorial
unit in question is a component unit of a federal State
or a specific autonomous area, and it is equally irrelevant
whether the internal law of the State in question gives the
federal parliament power to compel the component unit to
abide by the State’s international obligations. The award
in the “Montijo” case is the starting point for a consistent
series of decisions to this effect.117 The French-Mexican
Claims Commission in the Pellat case reaffirmed “the
principle of the international responsibility ... of a federal
State for all the acts of its separate States which give
rise to claims by foreign States” and noted specially that
such responsibility “... cannot be denied, not even in cases
where the federal Constitution denies the central Government
the right of control over the separate States or the
right to require them to comply, in their conduct, with the
rules of international law”.118 That rule has since been
consistently applied. Thus, for example, in the LaGrand
case, ICJ said:
Whereas the international responsibility of a State is engaged by the action
of the competent organs and authorities acting in that State, whatever
they may be; whereas the United States should take all measures at
its disposal to ensure that Walter LaGrand is not executed pending the
final decision in these proceedings; whereas, according to the information
available to the Court, implementation of the measures indicated
in the present Order falls within the jurisdiction of the Governor of
Arizona; whereas the Government of the United States is consequently
under the obligation to transmit the present Order to the said Governor;
whereas the Governor of Arizona is under the obligation to act in conformity
with the international undertakings of the United States.119
115 UNRIAA, vol. XIII (Sales No. 64.V.3), p. 150, at p. 161 (1951).
For earlier decisions, see, e.g., the Pieri Dominique and Co. case, ibid.,
vol. X (Sales No. 60.V.4), p. 139, at p. 156 (1905).
116 League of Nations, Conference for the Codification of International
Law, Bases of Discussion … (see footnote 104 above), p. 90;
Supplement to Vol. III … (ibid.), pp. 3 and 18.
117 See Moore, History and Digest, vol. II, p. 1440, at p. 1440
(1874). See also De Brissot and others, Moore, History and Digest,
vol. III, p. 2967, at pp. 2970–2971 (1855); Pieri Dominique and Co.
(footnote 115 above), at pp. 156–157; Davy case, UNRIAA, vol. IX
(Sales No. 59.V.5), p. 467, at p. 468 (1903); Janes case (footnote 94
above); Swinney, UNRIAA, vol. IV (Sales No. 1951.V.1), p. 101 (1925);
Quintanilla, ibid., p. 101, at p. 103 (1925); Youmans, ibid., p. 110,
at p. 116 (1925); Mallén, ibid., p. 173, at p. 177 (1927); Venable, ibid.,
p. 218, at p. 230 (1925); and Tribolet, ibid., p. 598, at p. 601 (1925).
118 UNRIAA, vol. V (Sales No. 1952.V.3), p. 534, at p. 536 (1929).
119 LaGrand, Provisional Measures (see footnote 91 above).
See also LaGrand (Germany v. United States of America), Judgment,
I.C.J.Reports 2001, p. 466, at p. 495, para. 81.
42	 Report of the International Law Commission on the work of its fifty-third session
(10)  The reasons for this position are reinforced by the
fact that federal States vary widely in their structure and
distribution of powers, and that in most cases the constituent
units have no separate international legal personality
of their own (however limited), nor any treaty-making
power. In those cases where the constituent unit of a federation
is able to enter into international agreements on its
own account,120 the other party may well have agreed to
limit itself to recourse against the constituent unit in the
event of a breach. In that case the matter will not involve
the responsibility of the federal State and will fall outside
the scope of the present articles.Another possibility is that
the responsibility of the federal State under a treaty may
be limited by the terms of a federal clause in the treaty.121
This is clearly an exception to the general rule, applicable
solely in relations between the States parties to the treaty
and in the matters which the treaty covers. It has effect
by virtue of the lex specialis principle, dealt with in article
55.
(11)  Paragraph 2 explains the relevance of internal law
in determining the status of a State organ. Where the law
of a State characterizes an entity as an organ, no difficulty
will arise. On the other hand, it is not sufficient to refer to
internal law for the status of State organs. In some systems
the status and functions of various entities are determined
not only by law but also by practice, and reference exclusively
to internal law would be misleading. The internal
law of a State may not classify, exhaustively or at all,
which entities have the status of “organs”. In such cases,
while the powers of an entity and its relation to other bodies
under internal law will be relevant to its classification
as an “organ”, internal law will not itself perform the task
of classification. Even if it does so, the term “organ” used
in internal law may have a special meaning, and not the
very broad meaning it has under article 4. For example,
under some legal systems the term “government” refers
only to bodies at the highest level such as the Head of
State and the cabinet of ministers. In others, the police
have a special status, independent of the executive; this
cannot mean that for international law purposes they are
not organs of the State.122 Accordingly, a State cannot
avoid responsibility for the conduct of a body which does
in truth act as one of its organs merely by denying it that
status under its own law. This result is achieved by the use
of the word “includes” in paragraph 2.
(12)  The term “person or entity” is used in article 4,
paragraph 2, as well as in articles 5 and 7. It is used in a
broad sense to include any natural or legal person, including
an individual office holder, a department, commission
or other body exercising public authority, etc. The term
“entity” is used in a similar sense123 in the draft articles
120 See, e.g., articles 56, paragraph 3, and 172, paragraph 3, of the
Constitution of the Swiss Confederation of 18 April 1999.
121 See, e.g., article 34 of the Convention for the Protection of the
World Cultural and Natural Heritage.
122 See, e.g., the Church of Scientology case, Germany, Federal Supreme
Court, Judgment of 26 September 1978, case No. VI ZR 267/76,
Neue Juristische Wochenschrift, No. 21 (May 1979), p. 1101; ILR, 
vol. 65, p. 193; and Propend Finance Pty Ltd. v. Sing, England, Court of
Appeal, ILR, vol. 111, p. 611 (1997). These were State immunity cases,
but the same principle applies in the field of State responsibility.
123 See Yearbook … 1991, vol. II (Part Two), pp. 14–18.
on jurisdictional immunities of States and their property,
adopted in 1991.
(13)  Although the principle stated in article 4 is clear
and undoubted, difficulties can arise in its application.
A particular problem is to determine whether a person
who is a State organ acts in that capacity. It is irrelevant
for this purpose that the person concerned may have had
ulterior or improper motives or may be abusing public
power. Where such a person acts in an apparently
official capacity, or under colour of authority, the actions
in question will be attributable to the State. The distinction
between unauthorized conduct of a State organ and
purely private conduct has been clearly drawn in international
arbitral decisions. For example, the award of the
Mexico-United States General Claims Commission in the
Mallén case involved, first, the act of an official acting in
a private capacity and, secondly, another act committed
by the same official in his official capacity, although in an
abusive way.124 The latter action was, and the former was
not, held attributable to the State. The French-Mexican
Claims Commission in the Caire case excluded responsibility
only in cases where “the act had no connexion with
the official function and was, in fact, merely the act of a
private individual”.125 The case of purely private conduct
should not be confused with that of an organ functioning
as such but acting ultra vires or in breach of the rules
governing its operation. In this latter case, the organ is
nevertheless acting in the name of the State: this principle
is affirmed in article 7.126 In applying this test, of course,
each case will have to be dealt with on the basis of its own
facts and circumstances.
Article 5.  Conduct of persons or entities exercising
elements of governmental authority
The conduct of a person or entity which is not an
organ of the State under article 4 but which is empowered
by the law of that State to exercise elements of
the governmental authority shall be considered an act
of the State under international law, provided the person
or entity is acting in that capacity in the particular
instance.
Commentary
(1)  Article 5 deals with the attribution to the State of
conduct of bodies which are not State organs in the sense
of article 4, but which are nonetheless authorized to
exercise governmental authority. The article is intended
to take account of the increasingly common phenomenon
of parastatal entities, which exercise elements of governmental
authority in place of State organs, as well as
situations where former State corporations have been privatized
but retain certain public or regulatory functions.
124 Mallén (see footnote 117 above), at p. 175.
125 UNRIAA, vol. V (Sales No. 1952.V.3), p. 516, at p. 531 (1929).
See also the Bensley case in Moore, History and Digest, vol. III, p. 3018
(1850) (“a wanton trespass … under no color of official proceedings,
and without any connection with his official duties”); and the Castelain
case ibid., p. 2999 (1880). See further article 7 and commentary.
126 See paragraph (7) of the commentary to article 7.
	 State responsibility	 43
(2)  The generic term “entity” reflects the wide variety
of bodies which, though not organs, may be empowered
by the law of a State to exercise elements of governmental
authority. They may include public corporations, semipublic
entities, public agencies of various kinds and even,
in special cases, private companies, provided that in each
case the entity is empowered by the law of the State to
exercise functions of a public character normally exercised
by State organs, and the conduct of the entity relates
to the exercise of the governmental authority concerned.
For example, in some countries private security firms may
be contracted to act as prison guards and in that capacity
may exercise public powers such as powers of detention
and discipline pursuant to a judicial sentence or to prison
regulations. Private or State-owned airlines may have
delegated to them certain powers in relation to immigration
control or quarantine. In one case before the Iran-United
States Claims Tribunal, an autonomous foundation established
by the State held property for charitable purposes
under close governmental control; its powers included the
identification of property for seizure. It was held that it
was a public and not a private entity, and therefore within
the tribunal’s jurisdiction; with respect to its administration
of allegedly expropriated property, it would in any
event have been covered by article 5.127
(3)  The fact that an entity can be classified as public or
private according to the criteria of a given legal system,
the existence of a greater or lesser State participation in its
capital, or, more generally, in the ownership of its assets,
the fact that it is not subject to executive control—these
are not decisive criteria for the purpose of attribution of
the entity’s conduct to the State. Instead, article 5 refers
to the true common feature, namely that these entities
are empowered, if only to a limited extent or in a specific
context, to exercise specified elements of governmental
authority.
(4)  Parastatal entities may be considered a relatively
modern phenomenon, but the principle embodied in article
5 has been recognized for some time. For example,
the replies to the request for information made by the
Preparatory Committee for the 1930 Hague Conference
indicated strong support from some Governments for the
attribution to the State of the conduct of autonomous bodies
exercising public functions of an administrative or legislative
character. The German Government, for example,
asserted that:
when, by delegation of powers, bodies act in a public capacity, e.g.,
police an area … the principles governing the responsibility of the State
for its organs apply with equal force. From the point of view of international
law, it does not matter whether a State polices a given area
with its own police or entrusts this duty, to a greater or less extent, to
autonomous bodies.128
The Preparatory Committee accordingly prepared the
following basis of discussion, though the Third Commit-
127 Hyatt International Corporation v. The Government of the Islamic
Republic of Iran, Iran-U.S. C.T.R., vol. 9, p. 72, at pp. 88–94
(1985).
128 League of Nations, Conference for the Codification of International
Law, Bases of Discussion … (see footnote 88 above), p. 90.
The German Government noted that these remarks would extend to the
situation where “the State, as an exceptional measure, invests private
organisations with public powers and duties or authorities [sic] them
to exercise sovereign rights, as in the case of private railway companies
permitted to maintain a police force”, ibid.
tee of the Conference was unable in the time available to
examine it:
A State is responsible for damage suffered by a foreigner as the result of
acts or omissions of such … autonomous institutions as exercise public
functions of a legislative or administrative character, if such acts or
omissions contravene the international obligations of the State.129
(5)  The justification for attributing to the State under international
law the conduct of “parastatal” entities lies in
the fact that the internal law of the State has conferred on
the entity in question the exercise of certain elements of
the governmental authority. If it is to be regarded as an act
of the State for purposes of international responsibility,
the conduct of an entity must accordingly concern governmental
activity and not other private or commercial activity
in which the entity may engage. Thus, for example,
the conduct of a railway company to which certain police
powers have been granted will be regarded as an act of the
State under international law if it concerns the exercise of
those powers, but not if it concerns other activities (e.g.
the sale of tickets or the purchase of rolling stock).
(6)  Article 5 does not attempt to identify precisely the
scope of “governmental authority” for the purpose of attribution
of the conduct of an entity to the State. Beyond
a certain limit, what is regarded as “governmental” depends
on the particular society, its history and traditions.
Of particular importance will be not just the content of the
powers, but the way they are conferred on an entity, the
purposes for which they are to be exercised and the extent
to which the entity is accountable to government for their
exercise. These are essentially questions of the application
of a general standard to varied circumstances.
(7)  The formulation of article 5 clearly limits it to entities
which are empowered by internal law to exercise
governmental authority. This is to be distinguished from
situations where an entity acts under the direction or
control of the State, which are covered by article 8, and
those where an entity or group seizes power in the absence
of State organs but in situations where the exercise of
governmental authority is called for: these are dealt with
in article 9. For the purposes of article 5, an entity is
covered even if its exercise of authority involves an independent
discretion or power to act; there is no need to
show that the conduct was in fact carried out under the
control of the State. On the other hand, article 5 does not
extend to cover, for example, situations where internal
law authorizes or justifies certain conduct by way of selfhelp
or self-defence; i.e. where it confers powers upon
or authorizes conduct by citizens or residents generally.
The internal law in question must specifically authorize
the conduct as involving the exercise of public authority;
it is not enough that it permits activity as part of the
general regulation of the affairs of the community.
It is accordingly a narrow category.
Article 6.  Conduct of organs placed at the disposal
of a State by another State
The conduct of an organ placed at the disposal of
a State by another State shall be considered an act of
the former State under international law if the organ is
129 Ibid., p. 92.
44	 Report of the International Law Commission on the work of its fifty-third session
acting in the exercise of elements of the governmental
authority of the State at whose disposal it is placed.
Commentary
(1)  Article 6 deals with the limited and precise situation
in which an organ of a State is effectively put at the disposal
of another State so that the organ may temporarily
act for its benefit and under its authority. In such a case,
the organ, originally that of one State, acts exclusively for
the purposes of and on behalf of another State and its conduct
is attributed to the latter State alone.
(2)  The words “placed at the disposal of” in article 6
express the essential condition that must be met in order
for the conduct of the organ to be regarded under international
law as an act of the receiving and not of the sending
State. The notion of an organ “placed at the disposal of”
the receiving State is a specialized one, implying that the
organ is acting with the consent, under the authority of
and for the purposes of the receiving State. Not only must
the organ be appointed to perform functions appertaining
to the State at whose disposal it is placed, but in performing
the functions entrusted to it by the beneficiary State,
the organ must also act in conjunction with the machinery
of that State and under its exclusive direction and control,
rather than on instructions from the sending State.
Thus article 6 is not concerned with ordinary situations of
inter-State cooperation or collaboration, pursuant to treaty
or otherwise.130
(3)  Examples of situations that could come within this
limited notion of a State organ “placed at the disposal” of
another State might include a section of the health service
or some other unit placed under the orders of another
country to assist in overcoming an epidemic or natural
disaster, or judges appointed in particular cases to act as
judicial organs of another State. On the other hand, mere
aid or assistance offered by organs of one State to another
on the territory of the latter is not covered by article 6. For
example, armed forces may be sent to assist another State
in the exercise of the right of collective self-defence or
for other purposes. Where the forces in question remain
under the authority of the sending State, they exercise elements
of the governmental authority of that State and not
of the receiving State. Situations can also arise where the
organ of one State acts on the joint instructions of its own
and another State, or there may be a single entity which is
a joint organ of several States. In these cases, the conduct
in question is attributable to both States under other articles
of this chapter.131
(4)  Thus, what is crucial for the purposes of article 6 is
the establishment of a functional link between the organ
in question and the structure or authority of the receiv-
130 Thus, the conduct of Italy in policing illegal immigration at sea
pursuant to an agreement with Albania was not attributable to Albania:
Xhavara and Others v. Italy and Albania, application No. 39473/98,
Eur. Court H.R., decision of 11 January 2001. Conversely, the conduct
of Turkey taken in the context of the Turkey-European Communities
customs union was still attributable to Turkey: see WTO, Report of the
Panel, Turkey: Restrictions on Imports of Textile and Clothing Products
(WT/DS34/R), 31 May 1999, paras. 9.33–9.44.
131 See also article 47 and commentary.
ing State. The notion of an organ “placed at the disposal”
of another State excludes the case of State organs, sent
to another State for the purposes of the former State or
even for shared purposes, which retain their own autonomy
and status: for example, cultural missions, diplomatic
or consular missions, foreign relief or aid organizations.
Also excluded from the ambit of article 6 are situations in
which functions of the “beneficiary” State are performed
without its consent, as when a State placed in a position
of dependence, territorial occupation or the like is compelled
to allow the acts of its own organs to be set aside
and replaced to a greater or lesser extent by those of the
other State.132
(5)  There are two further criteria that must be met for
article 6 to apply. First, the organ in question must possess
the status of an organ of the sending State; and secondly
its conduct must involve the exercise of elements of the
governmental authority of the receiving State. The first
of these conditions excludes from the ambit of article 6
the conduct of private entities or individuals which have
never had the status of an organ of the sending State. For
example, experts or advisers placed at the disposal of a
State under technical assistance programmes do not usually
have the status of organs of the sending State. The
second condition is that the organ placed at the disposal of
a State by another State must be “acting in the exercise of
elements of the governmental authority” of the receiving
State. There will only be an act attributable to the receiving
State where the conduct of the loaned organ involves
the exercise of the governmental authority of that State.
By comparison with the number of cases of cooperative
action by States in fields such as mutual defence, aid and
development, article 6 covers only a specific and limited
notion of “transferred responsibility”. Yet, in State practice
the situation is not unknown.
(6)  In the Chevreau case, a British consul in Persia,
temporarily placed in charge of the French consulate, lost
some papers entrusted to him. On a claim being brought
by France, Arbitrator Beichmann held that: “the British
Government cannot be held responsible for negligence
by its Consul in his capacity as the person in charge of
the Consulate of another Power.”133 It is implicit in the
Arbitrator’s finding that the agreed terms on which the
British Consul was acting contained no provision allocating
responsibility for the Consul’s acts. If a third State had
brought a claim, the proper respondent in accordance with
article 6 would have been the State on whose behalf the
conduct in question was carried out.
(7)  Similar issues were considered by the European
Commission of Human Rights in two cases relating to the
exercise by Swiss police in Liechtenstein of “delegated”
powers.134 At the relevant time Liechtenstein was not
132 For the responsibility of a State for directing, controlling or
coercing the internationally wrongful act of another, see articles 17 and
18 and commentaries.
133 UNRIAA, vol. II (Sales No. 1949.V.1), p. 1113, at p. 1141
(1931).
134 X and Y v. Switzerland, application Nos. 7289/75 and 7349/76,
decision of 14 July 1977; Council of Europe, European Commission
of Human Rights, Decisions and Reports, vol. 9, p. 57; and Yearbook
of the European Convention on Human Rights, 1977, vol. 20 (1978),
p. 372, at pp. 402–406.
	 State responsibility	 45
a party to the Convention for the Protection of Human
Rights and Fundamental Freedoms (European Convention
on Human Rights), so that if the conduct was attributable
only to Liechtenstein no breach of the Convention
could have occurred. The Commission held the case admissible,
on the basis that under the treaty governing the
relations between Switzerland and Liechtenstein of 1923,
Switzerland exercised its own customs and immigration
jurisdiction in Liechtenstein, albeit with the latter’s consent
and in their mutual interest. The officers in question
were governed exclusively by Swiss law and were considered
to be exercising the public authority of Switzerland.
In that sense, they were not “placed at the disposal” of the
receiving State.135
(8)  A further, long-standing example of a situation to
which article 6 applies is the Judicial Committee of the
Privy Council, which has acted as the final court of appeal
for a number of independent States within the Commonwealth.
Decisions of the Privy Council on appeal from
an independent Commonwealth State will be attributable
to that State and not to the United Kingdom. The Privy
Council’s role is paralleled by certain final courts of appeal
acting pursuant to treaty arrangements.136 There are
many examples of judges seconded by one State to another
for a time: in their capacity as judges of the receiving
State, their decisions are not attributable to the sending
State, even if it continues to pay their salaries.
(9)  Similar questions could also arise in the case of organs
of international organizations placed at the disposal
of a State and exercising elements of that State’s governmental
authority. This is even more exceptional than
the inter-State cases to which article 6 is limited. It also
raises difficult questions of the relations between States
and international organizations, questions which fall outside
the scope of these articles. Article 57 accordingly excludes
from the ambit of the articles all questions of the
responsibility of international organizations or of a State
for the acts of an international organization. By the same
token, article 6 does not concern those cases where, for
example, accused persons are transferred by a State to an
international institution pursuant to treaty.137 In cooperating
with international institutions in such a case, the State
concerned does not assume responsibility for their subsequent
conduct.
Article 7.  Excess of authority or contravention
of instructions
The conduct of an organ of a State or of a person
or entity empowered to exercise elements of the governmental
authority shall be considered an act of the
135 See also Drozd and Janousek v. France and Spain, Eur. Court
H.R., Series A, No. 240 (1992), paras. 96 and 110. See also Controller
and Auditor-General v. Davison (New Zealand, Court of Appeal), ILR,
vol. 104 (1996), p. 526, at pp. 536–537 (Cooke, P.) and pp. 574–576
(Richardson, J.). An appeal to the Privy Council on other grounds was
dismissed, Brannigan v. Davison, ibid., vol. 108, p. 622.
136 For example, Agreement relating to Appeals to the High Court of
Australia from the Supreme Court of Nauru (Nauru, 6 September 1976)
(United Nations, Treaty Series, vol. 1216, No. 19617, p. 151).
137 See, e.g., article 89 of the Rome Statute of the International
Criminal Court.
State under international law if the organ, person or
entity acts in that capacity, even if it exceeds its authority
or contravenes instructions.
Commentary
(1)  Article 7 deals with the important question of unauthorized
or ultra vires acts of State organs or entities.
It makes it clear that the conduct of a State organ or an
entity empowered to exercise elements of the governmental
authority, acting in its official capacity, is attributable
to the State even if the organ or entity acted in excess of
authority or contrary to instructions.
(2)  The State cannot take refuge behind the notion
that, according to the provisions of its internal law or
to instructions which may have been given to its organs
or agents, their actions or omissions ought not to have
occurred or ought to have taken a different form. This is
so even where the organ or entity in question has overtly
committed unlawful acts under the cover of its official
status or has manifestly exceeded its competence. It is
so even if other organs of the State have disowned the
conduct in question.138 Any other rule would contradict
the basic principle stated in article 3, since otherwise a
State could rely on its internal law in order to argue that
conduct, in fact carried out by its organs, was not attributable
to it.
(3)  The rule evolved in response to the need for clarity
and security in international relations. Despite early
equivocal statements in diplomatic practice and by arbitral
tribunals,139 State practice came to support the proposition,
articulated by the British Government in response
to an Italian request, that “all Governments should always
be held responsible for all acts committed by their agents
by virtue of their official capacity”.140 As the Spanish
Government pointed out: “If this were not the case, one
would end by authorizing abuse, for in most cases there
would be no practical way of proving that the agent had
or had not acted on orders received.”141 At this time the
United States supported “a rule of international law that
sovereigns are not liable, in diplomatic procedure, for
damages to a foreigner when arising from the misconduct
of agents acting out of the range not only of their real but
138 See, e.g., the “Star and Herald” controversy, Moore, Digest,
vol. VI, p. 775.
139 In a number of early cases, international responsibility was
attributed to the State for the conduct of officials without making it
clear whether the officials had exceeded their authority: see, e.g., the
following cases: “Only Son”, Moore, History and Digest, vol. IV,
pp. 3404–3405; “William Lee”, ibid., p. 3405; and Donoughho’s, ibid.,
vol. III, p. 3012. Where the question was expressly examined, tribunals
did not consistently apply any single principle: see, e.g., the Lewis’s
case, ibid., p. 3019; the Gadino case, UNRIAA, vol. XV (Sales No.
66.V.3), p. 414 (1901); the Lacaze case, Lapradelle-Politis, vol. II,
p. 290, at pp. 297–298; and the“William Yeaton” case, Moore, History
and Digest, vol. III, p. 2944, at p. 2946.
140 For the opinions of the British and Spanish Governments given
in 1898 at the request of Italy in respect of a dispute with Peru,
see Archivio del Ministero degli Affari esteri italiano, serie politica P,
No. 43.
141 Note verbale by Duke Almodóvar del Río, 4 July 1898, ibid.
46	 Report of the International Law Commission on the work of its fifty-third session
of their apparent authority”.142 It is probable that the different
formulations had essentially the same effect, since
acts falling outside the scope of both real and apparent
authority would not be performed “by virtue of … official
capacity”. In any event, by the time of the 1930 Hague
Conference, a majority of States responding to the Preparatory
Committee’s request for information were clearly in
favour of the broadest formulation of the rule, providing
for attribution to the State in the case of “[a]cts of officials
in the national territory in their public capacity (actes de
fonction) but exceeding their authority”.143 The Basis
of Discussion prepared by the Committee reflected this
view. The Third Committee of the Conference adopted an
article on first reading in the following terms:
International responsibility is … incurred by a State if damage is sustained
by a foreigner as a result of unauthorised acts of its officials
performed under cover of their official character, if the acts contravene
the international obligations of the State.144
(4)  The modern rule is now firmly established in this
sense by international jurisprudence, State practice and
the writings of jurists.145 It is confirmed, for example,
in article 91 of the Protocol Additional to the Geneva
Conventions of 12 August 1949, and relating to the
protection of victims of international armed conflicts
(Protocol I), which provides that: “A Party to the conflict
… shall be responsible for all acts committed by persons
forming part of its armed forces”: this clearly covers acts
committed contrary to orders or instructions. The commentary
notes that article 91 was adopted by consensus
and “correspond[s] to the general principles of law on
international responsibility”.146
(5)  A definitive formulation of the modern rule is found
in the Caire case. The case concerned the murder of a
French national by two Mexican officers who, after failing
to extort money, took Caire to the local barracks and
shot him. The Commission held:
that the two officers, even if they are deemed to have acted outside their
competence … and even if their superiors countermanded an order,
have involved the responsibility of the State, since they acted under
cover of their status as officers and used means placed at their disposal
on account of that status.147
142 “American Bible Society” incident, statement of United States
Secretary of State, 17 August 1885, Moore, Digest, vol. VI, p. 743;
“Shine and Milligen”, G. H. Hackworth, Digest of International Law
(Washington, D.C., United States Government Printing Office, 1943),
vol. V, p. 575; and “Miller”, ibid., pp. 570–571.
143 League of Nations, Conference for the Codification of International
Law, Bases of Discussion … (see footnote 88 above), point V,
No. 2 (b), p. 74, and Supplement to Vol. III … (see footnote 104 above),
pp. 3 and 17.
144 League of Nations, Conference for the Codification of International
Law, Bases of Discussion ..., document C.351(c)M.145(c).1930.
V (see footnote 88 above), p. 237. For a more detailed account of the
evolution of the modern rule, see Yearbook … 1975, vol. II, pp. 61–70.
145 For example, the 1961 revised draft by the Special Rapporteur,
Mr. García Amador, provided that “an act or omission shall likewise
be imputable to the State if the organs or officials concerned exceeded
their competence but purported to be acting in their official capacity”
(Yearbook ... 1961, vol. II, p. 53).
146 ICRC, Commentary on the Additional Protocols of 8 June 1977 to
the Geneva Conventions of 12 August 1949 (Geneva, Martinus Nijhoff,
1987), pp. 1053–1054.
147 Caire (see footnote 125 above). For other statements of the
rule, see Maal, UNRIAA, vol. X (Sales No. 60.V.4), pp. 732–733
(1903); La Masica, ibid., vol. XI (Sales No. 61.V.4), p. 560 (1916);
Youmans (footnote 117 above); Mallén, ibid.; Stephens, UNRIAA,
(6)  International human rights courts and tribunals
have applied the same rule. For example, the InterAmerican
Court of Human Rights in the Velásquez
Rodríguez case said:
This conclusion [of a breach of the Convention] is independent of
whether the organ or official has contravened provisions of internal
law or overstepped the limits of his authority: under international law a
State is responsible for the acts of its agents undertaken in their official
capacity and for their omissions, even when those agents act outside the
sphere of their authority or violate internal law.148
(7)  The central issue to be addressed in determining
the applicability of article 7 to unauthorized conduct of
official bodies is whether the conduct was performed
by the body in an official capacity or not. Cases where
officials acted in their capacity as such, albeit unlawfully
or contrary to instructions, must be distinguished from
cases where the conduct is so removed from the scope
of their official functions that it should be assimilated to
that of private individuals, not attributable to the State.
In the words of the Iran-United States Claims Tribunal,
the question is whether the conduct has been “carried out
by persons cloaked with governmental authority”.149
(8)  The problem of drawing the line between unauthorized
but still “official” conduct, on the one hand, and “private”
conduct on the other, may be avoided if the conduct
complained of is systematic or recurrent, such that
the State knew or ought to have known of it and should
have taken steps to prevent it. However, the distinction
between the two situations still needs to be made in some
cases, for example when considering isolated instances of
outrageous conduct on the part of persons who are officials.
That distinction is reflected in the expression “if the
organ, person or entity acts in that capacity” in article
7. This indicates that the conduct referred to comprises
only the actions and omissions of organs purportedly or
apparently carrying out their official functions, and not the
private actions or omissions of individuals who happen to
be organs or agents of the State.150 In short, the question
is whether they were acting with apparent authority.
(9)  As formulated, article 7 only applies to the conduct
of an organ of a State or of an entity empowered to
exercise elements of the governmental authority, i.e.
vol. IV (Sales No. 1951.V.1), pp. 267–268 (1927); and Way (footnote
114 above), pp. 400–401. The decision of the United States Court of
Claims in Royal Holland Lloyd v. United States, 73 Ct. Cl. 722 (1931)
(Annual Digest of Public International Law Cases (London, Butterworth,
1938), vol. 6, p. 442) is also often cited.
148 Velásquez Rodríguez (see footnote 63 above); see also ILR,
vol. 95, p. 232, at p. 296.
149 Petrolane, Inc. v. The Government of the Islamic Republic of Iran,
Iran-U.S. C.T.R., vol. 27, p. 64, at p. 92 (1991). See also paragraph (13)
of the commentary to article 4.
150 One form of ultra vires conduct covered by article 7 would be
for a State official to accept a bribe to perform some act or conclude
some transaction. The articles are not concerned with questions that
would then arise as to the validity of the transaction (cf. the 1969
Vienna Convention, art. 50). So far as responsibility for the corrupt
conduct is concerned, various situations could arise which it is not necessary
to deal with expressly in the present articles. Where one State
bribes an organ of another to perform some official act, the corrupting
State would be responsible either under article 8 or article 17. The
question of the responsibility of the State whose official had been bribed
towards the corrupting State in such a case could hardly arise, but there
could be issues of its responsibility towards a third party, which would
be properly resolved under article 7.
	 State responsibility	 47
only to those cases of attribution covered by articles 4, 5
and 6. Problems of unauthorized conduct by other persons,
groups or entities give rise to distinct problems, which are
dealt with separately under articles 8, 9 and 10.
(10)  As a rule of attribution, article 7 is not concerned
with the question whether the conduct amounted to a
breach of an international obligation.The fact that instructions
given to an organ or entity were ignored, or that its
actions were ultra vires, may be relevant in determining
whether or not the obligation has been breached, but that
is a separate issue.151 Equally, article 7 is not concerned
with the admissibility of claims arising from internationally
wrongful acts committed by organs or agents acting
ultra vires or contrary to their instructions. Where there
has been an unauthorized or invalid act under local law
and as a result a local remedy is available, this will have to
be resorted to, in accordance with the principle of exhaustion
of local remedies, before bringing an international
claim.152
Article 8.  Conduct directed or controlled by a State
The conduct of a person or group of persons shall
be considered an act of a State under international law
if the person or group of persons is in fact acting on
the instructions of, or under the direction or control
of, that State in carrying out the conduct.
Commentary
(1)  As a general principle, the conduct of private persons
or entities is not attributable to the State under international
law. Circumstances may arise, however, where
such conduct is nevertheless attributable to the State because
there exists a specific factual relationship between
the person or entity engaging in the conduct and the State.
Article 8 deals with two such circumstances. The first involves
private persons acting on the instructions of the
State in carrying out the wrongful conduct. The second
deals with a more general situation where private persons
act under the State’s direction or control.153 Bearing in
mind the important role played by the principle of effectiveness
in international law, it is necessary to take into
account in both cases the existence of a real link between
the person or group performing the act and the State ma-
chinery.
(2)  The attribution to the State of conduct in fact authorized
by it is widely accepted in international jurisprudence.154
In such cases it does not matter that the person
or persons involved are private individuals nor whether
151 See ELSI (footnote 85 above), especially at pp. 52, 62 and 74.
152 See further article 44, subparagraph (b), and commentary.
153 Separate issues are raised where one State engages in internationally
wrongful conduct at the direction or under the control of
another State: see article 17 and commentary, and especially paragraph
(7) for the meaning of the words “direction” and “control” in
various languages.
154 See, e.g., the Zafiro case, UNRIAA, vol. VI (Sales No. 1955.
V.3), p. 160 (1925); the Stephens case (footnote 147 above), p. 267;
and Lehigh Valley Railroad Company and Others (U.S.A.) v. Germany
(Sabotage cases): “Black Tom” and “Kingsland” incidents, ibid.,
vol. VIII (Sales No. 58.V.2), p. 84 (1930) and p. 458 (1939).
their conduct involves “governmental activity”. Most
commonly, cases of this kind will arise where State organs
supplement their own action by recruiting or instigating
private persons or groups who act as “auxiliaries” while
remaining outside the official structure of the State. These
include, for example, individuals or groups of private individuals
who, though not specifically commissioned by the
State and not forming part of its police or armed forces,
are employed as auxiliaries or are sent as “volunteers” to
neighbouring countries, or who are instructed to carry out
particular missions abroad.
(3)  More complex issues arise in determining whether
conduct was carried out “under the direction or control”
of a State. Such conduct will be attributable to the State
only if it directed or controlled the specific operation and
the conduct complained of was an integral part of that operation.
The principle does not extend to conduct which
was only incidentally or peripherally associated with an
operation and which escaped from the State’s direction or
control.
(4)  The degree of control which must be exercised by
the State in order for the conduct to be attributable to
it was a key issue in the Military and Paramilitary Activities
in and against Nicaragua case. The question was
whether the conduct of the contras was attributable to the
United States so as to hold the latter generally responsible
for breaches of international humanitarian law committed
by the contras. This was analysed by ICJ in terms of
the notion of “control”. On the one hand, it held that the
United States was responsible for the “planning, direction
and support” given by the United States to Nicaraguan
operatives.155 But it rejected the broader claim of Nicaragua
that all the conduct of the contras was attributable
to the United States by reason of its control over them. It
concluded that:
[D]espite the heavy subsidies and other support provided to them by
the United States, there is no clear evidence of the United States having
actually exercised such a degree of control in all fields as to justify
treating the contras as acting on its behalf.
…
All the forms of United States participation mentioned above, and even
the general control by the respondent State over a force with a high
degree of dependency on it, would not in themselves mean, without
further evidence, that the United States directed or enforced the perpetration
of the acts contrary to human rights and humanitarian law
alleged by the applicant State. Such acts could well be committed by
members of the contras without the control of the United States. For
this conduct to give rise to legal responsibility of the United States, it
would in principle have to be proved that that State had effective control
of the military or paramilitary operations in the course of which the
alleged violations were committed.156
Thus while the United States was held responsible for its
own support for the contras, only in certain individual
instances were the acts of the contras themselves held
attributable to it, based upon actual participation of and
directions given by that State. The Court confirmed that
a general situation of dependence and support would be
155 Military and Paramilitary Activities in and against Nicaragua
(see footnote 36 above), p. 51, para. 86.
156 Ibid., pp. 62 and 64–65, paras. 109 and 115. See also the concurring
opinion of Judge Ago, ibid., p. 189, para. 17.
48	 Report of the International Law Commission on the work of its fifty-third session
insufficient to justify attribution of the conduct to the
State.
(5)  The Appeals Chamber of the International Tribunal
for the FormerYugoslavia has also addressed these issues.
In the Tadi´c, case, the Chamber stressed that:
The requirement of international law for the attribution to States of acts
performed by private individuals is that the State exercises control over
the individuals. The degree of control may, however, vary according
to the factual circumstances of each case. The Appeals Chamber fails
to see why in each and every circumstance international law should
require a high threshold for the test of control.157
The Appeals Chamber held that the requisite degree of
control by the Yugoslavian “authorities over these armed
forces required by international law for considering the
armed conflict to be international was overall control
going beyond the mere financing and equipping of such
forces and involving also participation in the planning
and supervision of military operations”.158 In the course
of their reasoning, the majority considered it necessary to
disapprove the ICJ approach in the Military and ParamilitaryActivities
in and against Nicaragua case. But the legal
issues and the factual situation in the Tadi´c case were different
from those facing the Court in that case. The tribunal’s
mandate is directed to issues of individual criminal
responsibility, not State responsibility, and the question in
that case concerned not responsibility but the applicable
rules of international humanitarian law.159 In any event it
is a matter for appreciation in each case whether particular
conduct was or was not carried out under the control
of a State, to such an extent that the conduct controlled
should be attributed to it.160
(6)  Questions arise with respect to the conduct of companies
or enterprises which are State-owned and controlled.
If such corporations act inconsistently with the international
obligations of the State concerned the question
arises whether such conduct is attributable to the State. In
discussing this issue it is necessary to recall that international
law acknowledges the general separateness of corporate
entities at the national level, except in those cases
where the “corporate veil” is a mere device or a vehicle
for fraud or evasion.161 The fact that the State initially establishes
a corporate entity, whether by a special law or
otherwise, is not a sufficient basis for the attribution to
the State of the subsequent conduct of that entity.162 Since
157 Prosecutor v. Duško Tadi´c, International Tribunal for the Former
Yugoslavia, Case IT-94-1-A (1999), ILM, vol. 38, No. 6 (November
1999), p. 1518, at p. 1541, para. 117. For the judgment of the Trial
Chamber (Case IT-94-1-T (1997)), see ILR, vol. 112, p. 1.
158 ILM, vol. 38, No. 6 (November 1999), p. 1546, para. 145.
159 See the explanation given by Judge Shahabuddeen, ibid.,
pp. 1614–1615.
160 The problem of the degree of State control necessary for the
purposes of attribution of conduct to the State has also been dealt with,
for example, by the Iran-United States Claims Tribunal and the European
Court of Human Rights: Yeager (see footnote 101 above), p. 103.
See also Starrett Housing Corporation v. Government of the Islamic
Republic of Iran, Iran-U.S. C.T.R., vol. 4, p. 122, at p. 143 (1983);
Loizidou v. Turkey, Merits, Eur. Court H.R., Reports, 1996–VI, p. 2216,
at pp. 2235–2236, para. 56, also p. 2234, para. 52; and ibid., Preliminary
Objections, Eur. Court H.R., Series A, No. 310, p. 23, para. 62
(1995).
161 Barcelona Traction (see footnote 25 above), p. 39, paras. 56–58.
162 For example, the Workers’ Councils considered in Schering 
Corporation v. The Islamic Republic of Iran, Iran-U.S. C.T.R.,
corporate entities, although owned by and in that sense
subject to the control of the State, are considered to be
separate, prima facie their conduct in carrying out their
activities is not attributable to the State unless they are
exercising elements of governmental authority within
the meaning of article 5. This was the position taken, for
example, in relation to the de facto seizure of property by
a State-owned oil company, in a case where there was no
proof that the State used its ownership interest as a vehicle
for directing the company to seize the property.163 On the
other hand, where there was evidence that the corporation
was exercising public powers,164 or that the State was using
its ownership interest in or control of a corporation
specifically in order to achieve a particular result,165 the
conduct in question has been attributed to the State.166
(7)  It is clear then that a State may, either by specific
directions or by exercising control over a group, in
effect assume responsibility for their conduct. Each case
will depend on its own facts, in particular those concerning
the relationship between the instructions given or the
direction or control exercised and the specific conduct
complained of. In the text of article 8, the three terms “instructions”,
“direction” and “control” are disjunctive; it is
sufficient to establish any one of them. At the same time
it is made clear that the instructions, direction or control
must relate to the conduct which is said to have amounted
to an internationally wrongful act.
(8)  Where a State has authorized an act, or has exercised
direction or control over it, questions can arise as to the
State’s responsibility for actions going beyond the scope
of the authorization. For example, questions might arise
if the agent, while carrying out lawful instructions or
directions, engages in some activity which contravenes
both the instructions or directions given and the international
obligations of the instructing State. Such cases
can be resolved by asking whether the unlawful or unauthorized
conduct was really incidental to the mission or
clearly went beyond it. In general a State, in giving lawful
instructions to persons who are not its organs, does not
assume the risk that the instructions will be carried out in
an internationally unlawful way. On the other hand, where
persons or groups have committed acts under the effective
control of a State, the condition for attribution will still be
met even if particular instructions may have been ignored.
vol. 5, p. 361 (1984); Otis Elevator Company v. The Islamic Republic
of Iran, ibid., vol. 14, p. 283 (1987); and Eastman Kodak Company v. 
The Government of Iran, ibid., vol. 17, p. 153 (1987).
163 SEDCO, Inc. v. National Iranian Oil Company, ibid., vol. 15,
p. 23 (1987). See also International Technical Products Corporation
v. The Government of the Islamic Republic of Iran, ibid., vol. 9, p. 206
(1985); and Flexi-Van Leasing, Inc. v. The Government of the Islamic
Republic of Iran, ibid., vol. 12, p. 335, at p. 349 (1986).
164 Phillips Petroleum Company Iran v. The Islamic Republic of Iran,
ibid., vol. 21, p. 79 (1989); and Petrolane (see footnote 149 above).
165 Foremost Tehran, Inc. v. The Government of the Islamic Republic
of Iran, Iran-U.S. ibid., vol. 10, p. 228 (1986); and American Bell
International Inc. v. The Islamic Republic of Iran, ibid., vol. 12, p. 170
(1986).
166 See Hertzberg et al. v. Finland (Official Records of the General
Assembly, Thirty-seventh Session, Supplement No. 40 (A/37/40),
annex XIV, communication No. R.14/61, p. 161, at p. 164, para. 9.1)
(1982). See also X v. Ireland, application No. 4125/69, Yearbook of the 
European Convention on Human Rights, 1971, vol. 14 (1973), p. 199;
and Young, James and Webster v. the United Kingdom, Eur. Court H.R.,
Series A, No. 44 (1981).
	 State responsibility	 49
The conduct will have been committed under the control
of the State and it will be attributable to the State in accordance
with article 8.
(9)  Article 8 uses the words “person or group of persons”,
reflecting the fact that conduct covered by the article
may be that of a group lacking separate legal personality
but acting on a de facto basis. Thus, while a State may
authorize conduct by a legal entity such as a corporation,
it may also deal with aggregates of individuals or groups
that do not have legal personality but are nonetheless acting
as a collective.
Article 9.  Conduct carried out in the absence
or default of the official authorities
The conduct of a person or group of persons shall
be considered an act of a State under international law
if the person or group of persons is in fact exercising
elements of the governmental authority in the absence
or default of the official authorities and in circumstances
such as to call for the exercise of those elements of
authority.
Commentary
(1)  Article 9 deals with the exceptional case of conduct
in the exercise of elements of the governmental authority
by a person or group of persons acting in the absence of the
official authorities and without any actual authority to do
so. The exceptional nature of the circumstances envisaged
in the article is indicated by the phrase “in circumstances
such as to call for”. Such cases occur only rarely, such as
during revolution, armed conflict or foreign occupation,
where the regular authorities dissolve, are disintegrating,
have been suppressed or are for the time being inoperative.
They may also cover cases where lawful authority is
being gradually restored, e.g. after foreign occupation.
(2)  The principle underlying article 9 owes something to
the old idea of the levée en masse, the self-defence of the
citizenry in the absence of regular forces:167 in effect it is
a form of agency of necessity. Instances continue to occur
from time to time in the field of State responsibility. Thus,
the position of the Revolutionary Guards or “Komitehs”
immediately after the revolution in the Islamic Republic
of Iran was treated by the Iran-United States Claims Tribunal
as covered by the principle expressed in article 9.
Yeager concerned, inter alia, the action of performing immigration,
customs and similar functions at Tehran airport
in the immediate aftermath of the revolution. The tribunal
held the conduct attributable to the Islamic Republic of
Iran, on the basis that, if it was not actually authorized by
the Government, then the Guards:
167 This principle is recognized as legitimate by article 2 of the Regulations
respecting the Laws and Customs of War on Land (annexed to
the Hague Conventions II of 1899 and IV of 1907 respecting the Laws
and Customs of War on Land); and by article 4, paragraph A (6), of the
Geneva Convention relative to the Treatment of Prisoners of War of
12 August 1949.
at least exercised elements of governmental authority in the absence of
official authorities, in operations of which the new Government must
have had knowledge and to which it did not specifically object.168
(3)  Article 9 establishes three conditions which must be
met in order for conduct to be attributable to the State:
first, the conduct must effectively relate to the exercise of
elements of the governmental authority, secondly, the conduct
must have been carried out in the absence or default
of the official authorities, and thirdly, the circumstances
must have been such as to call for the exercise of those
elements of authority.
(4)  As regards the first condition, the person or group
actingmustbeperforminggovernmentalfunctions,though
they are doing so on their own initiative. In this respect,
the nature of the activity performed is given more weight
than the existence of a formal link between the actors and
the organization of the State. It must be stressed that the
private persons covered by article 9 are not equivalent to
a general de facto Government. The cases envisaged by
article 9 presuppose the existence of a Government in office
and of State machinery whose place is taken by irregulars
or whose action is supplemented in certain cases.
This may happen on part of the territory of a State which
is for the time being out of control, or in other specific
circumstances. A general de facto Government, on the
other hand, is itself an apparatus of the State, replacing
that which existed previously. The conduct of the organs
of such a Government is covered by article 4 rather than
article 9.169
(5)  In respect of the second condition, the phrase “in the
absence or default of” is intended to cover both the situation
of a total collapse of the State apparatus as well as
cases where the official authorities are not exercising their
functions in some specific respect, for instance, in the case
of a partial collapse of the State or its loss of control over a
certain locality. The phrase “absence or default” seeks to
capture both situations.
(6)  The third condition for attribution under article 9
requires that the circumstances must have been such as
to call for the exercise of elements of the governmental
authority by private persons. The term “call for” conveys
the idea that some exercise of governmental functions was
called for, though not necessarily the conduct in question.
In other words, the circumstances surrounding the exercise
of elements of the governmental authority by private
persons must have justified the attempt to exercise police
or other functions in the absence of any constituted authority.
There is thus a normative element in the form of
agency entailed by article 9, and this distinguishes these
situations from the normal principle that conduct of private
parties, including insurrectionary forces, is not attributable
to the State.170
168 Yeager (see footnote 101 above), p. 104, para. 43.
169 See, e.g., the award of 18 October 1923 by Arbitrator Taft in the
Tinoco case (footnote 87 above), pp. 381–382. On the responsibility
of the State for the conduct of de facto governments, see also J. A.
Frowein, Das de facto-Regime im Völkerrecht (Cologne, Heymanns,
1968), pp. 70–71. Conduct of a government in exile might be covered
by article 9, depending on the circumstances.
170 See, e.g., the Sambiaggio case, UNRIAA, vol. X (Sales
No. 60.V.4), p. 499, at p. 512 (1904); see also article 10 and
commentary.
50	 Report of the International Law Commission on the work of its fifty-third session
Article 10.  Conduct of an insurrectional
or other movement
1.  The conduct of an insurrectional movement
which becomes the new Government of a State shall
be considered an act of that State under international
law.
2.  The conduct of a movement, insurrectional or
other, which succeeds in establishing a new State in
part of the territory of a pre-existing State or in a territory
under its administration shall be considered an
act of the new State under international law.
3.  This article is without prejudice to the attribution
to a State of any conduct, however related to that
of the movement concerned, which is to be considered
an act of that State by virtue of articles 4 to 9.
Commentary
(1)  Article 10 deals with the special case of attribution
to a State of conduct of an insurrectional or other movement
which subsequently becomes the new Government
of the State or succeeds in establishing a new State.
(2)  At the outset, the conduct of the members of the
movement presents itself purely as the conduct of private
individuals. It can be placed on the same footing as that of
persons or groups who participate in a riot or mass demonstration
and it is likewise not attributable to the State.
Once an organized movement comes into existence as a
matter of fact, it will be even less possible to attribute its
conduct to the State, which will not be in a position to
exert effective control over its activities. The general principle
in respect of the conduct of such movements, committed
during the continuing struggle with the constituted
authority, is that it is not attributable to the State under
international law. In other words, the acts of unsuccessful
insurrectional movements are not attributable to the State,
unless under some other article of chapter II, for example
in the special circumstances envisaged by article 9.
(3)  Ample support for this general principle is found
in arbitral jurisprudence. International arbitral bodies,
including mixed claims commissions171 and arbitral tribunals172
have uniformly affirmed what Commissioner
Nielsen in the Solis case described as a “well-established
principle of international law”, that no Government can
be held responsible for the conduct of rebellious groups
committed in violation of its authority, where it is itself
guilty of no breach of good faith, or of no negligence in
suppressing insurrection.173 Diplomatic practice is remarkably
consistent in recognizing that the conduct of an
171 See the decisions of the various mixed commissions: Zuloaga
and Miramon Governments, Moore, History and Digest, vol. III,
p. 2873; McKenny case, ibid., p. 2881; Confederate States, ibid., p. 2886;
Confederate Debt, ibid., p. 2900; and Maximilian Government, ibid.,
p. 2902, at pp. 2928–2929.
172 See, e.g., British Claims in the Spanish Zone of Morocco
(footnote 44 above), p. 642; and the Iloilo Claims, UNRIAA, vol. VI
(Sales No. 1955.V.3), p. 158, at pp. 159–160 (1925).
173 UNRIAA, vol. IV (Sales No. 1951.V.1), p. 358, at p. 361 (1928)
(referring to Home Frontier and Foreign Missionary Society, ibid.,
vol. VI (Sales No. 1955.V.3), p. 42 (1920)); cf. the Sambiaggio case
(footnote 170 above), p. 524.
insurrectional movement cannot be attributed to the State.
This can be seen, for example, from the preparatory work
for the 1930 Hague Conference. Replies of Governments
to point IX of the request for information addressed to
them by the Preparatory Committee indicated substantial
agreement that: (a) the conduct of organs of an insurrectional
movement could not be attributed as such to the
State or entail its international responsibility; and (b) only
conduct engaged in by organs of the State in connection
with the injurious acts of the insurgents could be attributed
to the State and entail its international responsibility,
and then only if such conduct constituted a breach of an
international obligation of that State.174
(4)  The general principle that the conduct of an insurrectional
or other movement is not attributable to the State
is premised on the assumption that the structures and organization
of the movement are and remain independent
of those of the State. This will be the case where the State
successfully puts down the revolt. In contrast, where the
movement achieves its aims and either installs itself as the
new Government of the State or forms a new State in part
of the territory of the pre-existing State or in a territory
under its administration, it would be anomalous if the new
regime or new State could avoid responsibility for conduct
earlier committed by it. In these exceptional circumstances,
article 10 provides for the attribution of the conduct
of the successful insurrectional or other movement
to the State. The basis for the attribution of conduct of a
successful insurrectional or other movement to the State
under international law lies in the continuity between the
movement and the eventual Government. Thus the term
“conduct” only concerns the conduct of the movement as
such and not the individual acts of members of the movement,
acting in their own capacity.
(5)  Where the insurrectional movement, as a new Government,
replaces the previous Government of the State,
the ruling organization of the insurrectional movement
becomes the ruling organization of that State. The continuity
which thus exists between the new organization of
the State and that of the insurrectional movement leads
naturally to the attribution to the State of conduct which
the insurrectional movement may have committed during
the struggle. In such a case, the State does not cease to
exist as a subject of international law. It remains the same
State, despite the changes, reorganizations and adaptations
which occur in its institutions. Moreover, it is the
only subject of international law to which responsibility
can be attributed. The situation requires that acts committed
during the struggle for power by the apparatus of
the insurrectional movement should be attributable to the
State, alongside acts of the then established Government.
(6)  Where the insurrectional or other movement succeeds
in establishing a new State, either in part of the
territory of the pre-existing State or in a territory which
was previously under its administration, the attribution to
the new State of the conduct of the insurrectional or other
movement is again justified by virtue of the continuity be-
174 League of Nations, Conference for the Codification of International
Law, Bases of Discussion … (see footnote 88 above), p. 108;
and Supplement to Volume III … (see footnote 104 above), pp. 3
and 20.
	 State responsibility	 51
tween the organization of the movement and the organization
of the State to which it has given rise. Effectively the
same entity which previously had the characteristics of an
insurrectional or other movement has become the Government
of the State it was struggling to establish. The predecessor
State will not be responsible for those acts. The
only possibility is that the new State be required to assume
responsibility for conduct committed with a view to its
own establishment, and this represents the accepted rule.
(7)  Paragraph 1 of article 10 covers the scenario in
which the insurrectional movement, having triumphed,
has substituted its structures for those of the previous
Government of the State in question. The phrase “which
becomes the new Government” is used to describe this
consequence. However, the rule in paragraph 1 should not
be pressed too far in the case of governments of national
reconciliation, formed following an agreement between
the existing authorities and the leaders of an insurrectional
movement. The State should not be made responsible
for the conduct of a violent opposition movement merely
because, in the interests of an overall peace settlement,
elements of the opposition are drawn into a reconstructed
government. Thus, the criterion of application of paragraph
1 is that of a real and substantial continuity between
the former insurrectional movement and the new Government
it has succeeded in forming.
(8)  Paragraph 2 of article 10 addresses the second scenario,
where the structures of the insurrectional or other
revolutionary movement become those of a new State,
constituted by secession or decolonization in part of the
territory which was previously subject to the sovereignty
or administration of the predecessor State. The expression
“or in a territory under its administration” is included in
order to take account of the differing legal status of different
dependent territories.
(9)  A comprehensive definition of the types of groups
encompassed by the term “insurrectional movement” as
used in article 10 is made difficult by the wide variety
of forms which insurrectional movements may take in
practice, according to whether there is relatively limited
internal unrest, a genuine civil war situation, an anti-colonial
struggle, the action of a national liberation front,
revolutionary or counter-revolutionary movements and
so on. Insurrectional movements may be based in the territory
of the State against which the movement’s actions
are directed, or on the territory of a third State. Despite
this diversity, the threshold for the application of the laws
of armed conflict contained in the Protocol Additional to
the Geneva Conventions of 12 August 1949, and relating
to the protection of victims of non-international armed
conflicts (Protocol II) may be taken as a guide. Article
1, paragraph 1, refers to “dissident armed forces or other
organized armed groups which, under responsible command,
exercise such control over a part of [the relevant
State’s] territory as to enable them to carry out sustained
and concerted military operations and to implement this
Protocol”, and it contrasts such groups with “situations of
internal disturbances and tensions, such as riots, isolated
and sporadic acts of violence and other acts of a similar
nature” (art. 1, para. 2). This definition of “dissident
armed forces” reflects, in the context of the Protocols, the
essential idea of an “insurrectional movement”.
(10)  As compared with paragraph 1, the scope of the
attribution rule articulated by paragraph 2 is broadened to
include “insurrectional or other” movements. This terminology
reflects the existence of a greater variety of movements
whose actions may result in the formation of a new
State. The words do not, however, extend to encompass
the actions of a group of citizens advocating separation or
revolution where these are carried out within the framework
of the predecessor State. Nor does it cover the situation
where an insurrectional movement within a territory
succeeds in its agitation for union with another State. This
is essentially a case of succession, and outside the scope
of the articles, whereas article 10 focuses on the continuity
of the movement concerned and the eventual new
Government or State, as the case may be.
(11)  No distinction should be made for the purposes of
article 10 between different categories of movements on
the basis of any international “legitimacy” or of any illegality
in respect of their establishment as a Government,
despite the potential importance of such distinctions in
other contexts.175 From the standpoint of the formulation
of rules of law governing State responsibility, it is unnecessary
and undesirable to exonerate a new Government
or a new State from responsibility for the conduct of its
personnel by reference to considerations of legitimacy or
illegitimacy of its origin.176 Rather, the focus must be on
the particular conduct in question, and on its lawfulness or
otherwise under the applicable rules of international law.
(12)  Arbitral decisions, together with State practice and
the literature, indicate a general acceptance of the two
positive attribution rules in article 10. The international
arbitral decisions, e.g. those of the mixed commissions
established in respect of Venezuela (1903) and Mexico
(1920–1930), support the attribution of conduct by insurgents
where the movement is successful in achieving its
revolutionary aims. For example, in the Bolívar Railway
Company claim, the principle is stated in the following
terms:
The nation is responsible for the obligations of a successful revolution
from its beginning, because in theory, it represented ab initio a changing
national will, crystallizing in the finally successful result.177
The French-Venezuelan Mixed Claims Commission in
its decision concerning the French Company of Venezuelan
Railroads case emphasized that the State cannot be
held responsible for the acts of revolutionaries “unless the
revolution was successful”, since such acts then involve
the responsibility of the State “under the well-recognized
rules of public law”.178 In the Pinson case, the FrenchMexican
Claims Commission ruled that:
175 See H. Atlam, “National liberation movements and international
responsibility”, United Nations Codification of State Responsibility,
B. Simma and M. Spinedi, eds. (New York, Oceana, 1987), p. 35.
176 As ICJ said, “[p]hysical control of a territory, and not sovereignty
or legitimacy of title, is the basis of State liability for acts affecting
other States”, Legal Consequences for States of the Continued
Presence of South Africa in Namibia (South West Africa) notwith- 
standing Security Council Resolution 276 (1970), Advisory Opinion 
I.C.J. Reports 1971, p. 16, at p. 54, para. 118.
177 UNRIAA, vol. IX (Sales No. 59.V.5), p. 445, at p. 453 (1903).
See also Puerto Cabello and Valencia Railway Company, ibid., p. 510,
at p. 513 (1903).
178 Ibid., vol. X (Sales No. 60.V.4), p. 285, at p. 354 (1902). See also
the Dix case, ibid., vol. IX (Sales No. 59.V.5), p. 119 (1902).
52	 Report of the International Law Commission on the work of its fifty-third session
if the injuries originated, for example, in requisitions or forced contributions
demanded ... by revolutionaries before their final success, or if
they were caused ... by offences committed by successful revolutionary
forces, the responsibility of the State ... cannot be denied.179
(13)  The possibility of holding the State responsible for
the conduct of a successful insurrectional movement was
brought out in the request for information addressed to
Governments by the Preparatory Committee for the 1930
Hague Conference. On the basis of replies received from
a number of Governments, the Preparatory Committee
drew up the following Basis of Discussion: “A State is responsible
for damage caused to foreigners by an insurrectionist
party which has been successful and has become
the Government to the same degree as it is responsible
for damage caused by acts of the Government de jure or
its officials or troops.” 180 Although the proposition was
never discussed, it may be considered to reflect the rule of
attribution now contained in paragraph 2.
(14)  More recent decisions and practice do not, on the
whole, give any reason to doubt the propositions contained
in article 10. In one case, the Supreme Court of
Namibia went even further in accepting responsibility
for “anything done” by the predecessor administration of
South Africa.181
(15)  Exceptional cases may occur where the State was
in a position to adopt measures of vigilance, prevention
or punishment in respect of the movement’s conduct but
improperly failed to do so. This possibility is preserved by
paragraph 3 of article 10, which provides that the attribution
rules of paragraphs 1 and 2 are without prejudice to
the attribution to a State of any conduct, however related
to that of the movement concerned, which is to be considered
an act of that State by virtue of other provisions in
chapter II. The term “however related to that of the movement
concerned” is intended to have a broad meaning.
Thus, the failure by a State to take available steps to protect
the premises of diplomatic missions, threatened from
attack by an insurrectional movement, is clearly conduct
attributable to the State and is preserved by paragraph 3.
(16)  A further possibility is that the insurrectional movement
may itself be held responsible for its own conduct
under international law, for example for a breach of international
humanitarian law committed by its forces. The
topic of the international responsibility of unsuccessful
insurrectional or other movements, however, falls outside
the scope of the present articles, which are concerned only
with the responsibility of States.
179 Ibid., vol. V (Sales No. 1952.V.3), p. 327, at p. 353 (1928).
180 League of Nations, Conference for the Codification of International
Law, Bases of Discussion … (see footnote 88 above), pp. 108
and 116; and Basis of discussion No. 22 (c), ibid., p. 118; reproduced in
Yearbook ... 1956, vol. II, p. 223, at p. 224, document A/CN.4/96.
181 Guided in particular by a constitutional provision, the Supreme
Court of Namibia held that “the new government inherits responsibility
for the acts committed by the previous organs of the State”, Minister
of Defence, Namibia v. Mwandinghi, South African Law Reports,
1992 (2), p. 355, at p. 360; and ILR, vol. 91, p. 341, at p. 361. See, on
the other hand, 44123 Ontario Ltd. v. Crispus Kiyonga and Others,
11 Kampala Law Reports 14, pp. 20–21 (1992); and ILR, vol. 103,
p. 259, at p. 266 (High Court, Uganda).
Article 11. Conduct acknowledged and
adopted by a State as its own
Conduct which is not attributable to a State under
the preceding articles shall nevertheless be considered
an act of that State under international law if and to
the extent that the State acknowledges and adopts the
conduct in question as its own.
Commentary
(1)  All the bases for attribution covered in chapter II,
with the exception of the conduct of insurrectional or other
movements under article 10, assume that the status of
the person or body as a State organ, or its mandate to act
on behalf of the State, are established at the time of the
alleged wrongful act. Article 11, by contrast, provides for
the attribution to a State of conduct that was not or may
not have been attributable to it at the time of commission,
but which is subsequently acknowledged and adopted by
the State as its own.
(2)  In many cases, the conduct which is acknowledged
and adopted by a State will be that of private persons or
entities. The general principle, drawn from State practice
and international judicial decisions, is that the conduct
of a person or group of persons not acting on behalf of
the State is not considered as an act of the State under
international law. This conclusion holds irrespective of
the circumstances in which the private person acts and of
the interests affected by the person’s conduct.
(3)  Thus, like article 10, article 11 is based on the principle
that purely private conduct cannot as such be attributed
to a State. But it recognizes “nevertheless” that conduct
is to be considered as an act of a State “if and to the
extent that the State acknowledges and adopts the conduct
in question as its own”. Instances of the application of
the principle can be found in judicial decisions and State
practice. For example, in the Lighthouses arbitration, a
tribunal held Greece liable for the breach of a concession
agreement initiated by Crete at a period when the latter
was an autonomous territory of the Ottoman Empire,
partly on the basis that the breach had been “endorsed
by [Greece] as if it had been a regular transaction … and
eventually continued by her, even after the acquisition of
territorial sovereignty over the island”.182 In the context
of State succession, it is unclear whether a new State succeeds
to any State responsibility of the predecessor State
with respect to its territory.183 However, if the successor
State, faced with a continuing wrongful act on its territory,
endorses and continues that situation, the inference
may readily be drawn that it has assumed responsibility
for it.
(4)  Outside the context of State succession, the United
States Diplomatic and Consular Staff in Tehran case
provides a further example of subsequent adoption by a
182  Affaire relative à la concession des phares de l’Empire ottoman,
UNRIAA, vol. XII (Sales No. 63.V.3), p. 155, at p. 198 (1956).
183 The matter is reserved by article 39 of the Vienna Convention
on Succession of States in respect of Treaties (hereinafter “the 1978
Vienna Convention”).
	 State responsibility	 53
State of particular conduct. There ICJ drew a clear distinction
between the legal situation immediately following the
seizure of the United States embassy and its personnel by
the militants, and that created by a decree of the Iranian
State which expressly approved and maintained the situation.
In the words of the Court:
The policy thus announced by the Ayatollah Khomeini, of maintaining
the occupation of the Embassy and the detention of its inmates as hostages
for the purpose of exerting pressure on the United States Government
was complied with by other Iranian authorities and endorsed by
them repeatedly in statements made in various contexts. The result of
that policy was fundamentally to transform the legal nature of the situation
created by the occupation of the Embassy and the detention of its
diplomatic and consular staff as hostages. The approval given to these
facts by the Ayatollah Khomeini and other organs of the Iranian State,
and the decision to perpetuate them, translated continuing occupation
of the Embassy and detention of the hostages into acts of that State.184
In that case it made no difference whether the effect of the
“approval” of the conduct of the militants was merely prospective,
or whether it made the Islamic Republic of Iran
responsible for the whole process of seizure of the embassy
and detention of its personnel ab initio. The Islamic
Republic of Iran had already been held responsible in relation
to the earlier period on a different legal basis, viz.
its failure to take sufficient action to prevent the seizure or
to bring it to an immediate end.185 In other cases no such
prior responsibility will exist. Where the acknowledgement
and adoption is unequivocal and unqualified there
is good reason to give it retroactive effect, which is what
the tribunal did in the Lighthouses arbitration.186 This is
consistent with the position established by article 10 for
insurrectional movements and avoids gaps in the extent of
responsibility for what is, in effect, the same continuing
act.
(5)  As regards State practice, the capture and subsequent
trial in Israel of Adolf Eichmann may provide an
example of the subsequent adoption of private conduct by
a State. On 10 May 1960, Eichmann was captured by a
group of Israelis in Buenos Aires. He was held in captivity
in Buenos Aires in a private home for some weeks before
being taken by air to Israel. Argentina later charged the
IsraeliGovernmentwithcomplicityinEichmann’scapture,
a charge neither admitted nor denied by Israeli Foreign
Minister Golda Meir, during the discussion in the Security
Council of the complaint. She referred to Eichmann’s captors
as a “volunteer group”.187 Security Council resolution
138 (1960) of 23 June 1960 implied a finding that the
Israeli Government was at least aware of, and consented
to, the successful plan to capture Eichmann in Argentina.
It may be that Eichmann’s captors were “in fact acting
on the instructions of, or under the direction or control
of” Israel, in which case their conduct was more properly
attributed to the State under article 8. But where there are
doubts about whether certain conduct falls within article
8, these may be resolved by the subsequent adoption of
the conduct in question by the State.
184 United States Diplomatic and Consular Staff in Tehran (see
footnote 59 above), p. 35, para. 74.
185 Ibid., pp. 31–33, paras. 63–68.
186 Lighthouses arbitration (see footnote 182 above), pp. 197–198.
187 Official Records of the Security Council, Fifteenth Year, 866th
meeting, 22 June 1960, para. 18.
(6)  The phrase “acknowledges and adopts the conduct
in question as its own” is intended to distinguish cases
of acknowledgement and adoption from cases of mere
support or endorsement.188 ICJ in the United States Diplomatic
and Consular Staff in Tehran case used phrases
such as “approval”, “endorsement”, “the seal of official
governmental approval” and “the decision to perpetuate
[the situation]”.189 These were sufficient in the context of
that case, but as a general matter, conduct will not be attributable
to a State under article 11 where a State merely
acknowledges the factual existence of conduct or expresses
its verbal approval of it. In international controversies,
States often take positions which amount to “approval”
or “endorsement” of conduct in some general sense but
do not involve any assumption of responsibility. The language
of “adoption”, on the other hand, carries with it the
idea that the conduct is acknowledged by the State as, in
effect, its own conduct. Indeed, provided the State’s intention
to accept responsibility for otherwise non-attributable
conduct is clearly indicated, article 11 may cover cases
where a State has accepted responsibility for conduct of
which it did not approve, which it had sought to prevent
and which it deeply regretted. However such acceptance
may be phrased in the particular case, the term “acknowledges
and adopts” in article 11 makes it clear that what is
required is something more than a general acknowledgement
of a factual situation, but rather that the State identifies
the conduct in question and makes it its own.
(7)  The principle established by article 11 governs the
question of attribution only. Where conduct has been acknowledged
and adopted by a State, it will still be necessary
to consider whether the conduct was internationally
wrongful. For the purposes of article 11, the international
obligations of the adopting State are the criterion for
wrongfulness. The conduct may have been lawful so far
as the original actor was concerned, or the actor may have
been a private party whose conduct in the relevant respect
was not regulated by international law. By the same token,
a State adopting or acknowledging conduct which is lawful
in terms of its own international obligations does not
thereby assume responsibility for the unlawful acts of any
other person or entity. Such an assumption of responsibility
would have to go further and amount to an agreement
to indemnify for the wrongful act of another.
(8)  The phrase “if and to the extent that” is intended to
convey a number of ideas. First, the conduct of, in particular,
private persons, groups or entities is not attributable to
the State unless under some other article of chapter II or
unless it has been acknowledged and adopted by the State.
Secondly, a State might acknowledge and adopt conduct
only to a certain extent. In other words, a State may elect
to acknowledge and adopt only some of the conduct in
question. Thirdly, the act of acknowledgment and adoption,
whether it takes the form of words or conduct, must
be clear and unequivocal.
(9)  The conditions of acknowledgement and adoption
are cumulative, as indicated by the word “and”. The order
of the two conditions indicates the normal sequence of
188 The separate question of aid or assistance by a State to internationally
wrongful conduct of another State is dealt with in article 16.
189 See footnote 59 above.
54	 Report of the International Law Commission on the work of its fifty-third session
events in cases in which article 11 is relied on. Acknowledgement
and adoption of conduct by a State might be
express (as for example in the United States Diplomatic
and Consular Staff in Tehran case), or it might be inferred
from the conduct of the State in question.
Chapter III
BREACH OF AN INTERNATIONAL OBLIGATION
Commentary
(1)  There is a breach of an international obligation when
conduct attributed to a State as a subject of international
law amounts to a failure by that State to comply with an
international obligation incumbent upon it or, to use the
language of article 2, subparagraph (b), when such conduct
constitutes “a breach of an international obligation
of the State”. This chapter develops the notion of a breach
of an international obligation, to the extent that this is possible
in general terms.
(2)  It must be stressed again that the articles do not
purport to specify the content of the primary rules of
international law, or of the obligations thereby created
for particular States.190 In determining whether given
conduct attributable to a State constitutes a breach of its
international obligations, the principal focus will be on
the primary obligation concerned. It is this which has to
be interpreted and applied to the situation, determining
thereby the substance of the conduct required, the standard
to be observed, the result to be achieved, etc. There is
no such thing as a breach of an international obligation in
the abstract, and chapter III can only play an ancillary role
in determining whether there has been such a breach, or
the time at which it occurred, or its duration. Nonetheless,
a number of basic principles can be stated.
(3)  The essence of an internationally wrongful act lies in
the non-conformity of the State’s actual conduct with the
conduct it ought to have adopted in order to comply with
a particular international obligation. Such conduct gives
rise to the new legal relations which are grouped under
the common denomination of international responsibility.
Chapter III, therefore, begins with a provision specifying
in general terms when it may be considered that there is a
breach of an international obligation (art. 12). The basic
concept having been defined, the other provisions of the
chapter are devoted to specifying how this concept applies
to various situations. In particular, the chapter deals with
the question of the intertemporal law as it applies to State
responsibility, i.e. the principle that a State is only responsible
for a breach of an international obligation if the obligation
is in force for the State at the time of the breach
(art. 13), with the equally important question of continuing
breaches (art. 14), and with the special problem of determining
whether and when there has been a breach of an
obligation which is directed not at single but at composite
acts, i.e. where the essence of the breach lies in a series of
acts defined in aggregate as wrongful (art. 15).
190 See paragraphs (2) to (4) of the general commentary.
(4)  For the reason given in paragraph (2) above, it is
neither possible nor desirable to deal in the framework
of this Part with all the issues that can arise in determining
whether there has been a breach of an international
obligation. Questions of evidence and proof of such a
breach fall entirely outside the scope of the articles. Other
questions concern rather the classification or typology of
international obligations. These have only been included
in the text where they can be seen to have distinct consequences
within the framework of the secondary rules of
State responsibility.191
Article 12.  Existence of a breach of an
international obligation
There is a breach of an international obligation by
a State when an act of that State is not in conformity
with what is required of it by that obligation, regardless
of its origin or character.
Commentary
(1)  As stated in article 2, a breach by a State of an international
obligation incumbent upon it gives rise to its
international responsibility. It is first necessary to specify
what is meant by a breach of an international obligation.
This is the purpose of article 12, which defines in the
most general terms what constitutes a breach of an international
obligation by a State. In order to conclude that
there is a breach of an international obligation in any specific
case, it will be necessary to take account of the other
provisions of chapter III which specify further conditions
relating to the existence of a breach of an international
obligation, as well as the provisions of chapter V dealing
with circumstances which may preclude the wrongfulness
of an act of a State. But in the final analysis, whether and
when there has been a breach of an obligation depends on
the precise terms of the obligation, its interpretation and
application, taking into account its object and purpose and
the facts of the case.
(2)  In introducing the notion of a breach of an international
obligation, it is necessary again to emphasize the
autonomy of international law in accordance with the
principle stated in article 3. In the terms of article 12, the
breach of an international obligation consists in the disconformity
between the conduct required of the State by
that obligation and the conduct actually adopted by the
State—i.e. between the requirements of international law
and the facts of the matter. This can be expressed in different
ways. For example, ICJ has used such expressions as
“incompatibility with the obligations” of a State,192 acts
“contrary to” or “inconsistent with” a given rule,193 and
191 See, e.g., the classification of obligations of conduct and results,
paragraphs (11) to (12) of the commentary to article 12.
192 United States Diplomatic and Consular Staff in Tehran 
(see footnote 59 above), p. 29, para. 56.
193 Military and Paramilitary Activities in and against Nicaragua
(see footnote 36 above), p. 64, para. 115, and p. 98, para. 186, respec-
tively.
	 State responsibility	 55
“failure to comply with its treaty obligations”.194 In the
ELSI case, a Chamber of the Court asked the “question
whether the requisition was in conformity with the requirements
… of the FCN Treaty”.195 The expression “not
in conformity with what is required of it by that obligation”
is the most appropriate to indicate what constitutes
the essence of a breach of an international obligation by a
State. It allows for the possibility that a breach may exist
even if the act of the State is only partly contrary to an
international obligation incumbent upon it. In some cases
precisely defined conduct is expected from the State
concerned; in others the obligation only sets a minimum
standard above which the State is free to act. Conduct proscribed
by an international obligation may involve an act
or an omission or a combination of acts and omissions; it
may involve the passage of legislation, or specific administrative
or other action in a given case, or even a threat
of such action, whether or not the threat is carried out,
or a final judicial decision. It may require the provision
of facilities, or the taking of precautions or the enforcement
of a prohibition. In every case, it is by comparing
the conduct in fact engaged in by the State with the conduct
legally prescribed by the international obligation that
one can determine whether or not there is a breach of that
obligation. The phrase “is not in conformity with” is flexible
enough to cover the many different ways in which an
obligation can be expressed, as well as the various forms
which a breach may take.
(3)  Article 12 states that there is a breach of an international
obligation when the act in question is not in conformity
with what is required by that obligation “regardless
of its origin”. As this phrase indicates, the articles
are of general application. They apply to all international
obligations of States, whatever their origin may be. International
obligations may be established by a customary
rule of international law, by a treaty or by a general
principle applicable within the international legal order.
States may assume international obligations by a unilateral
act.196 An international obligation may arise from provisions
stipulated in a treaty (a decision of an organ of an
international organization competent in the matter, a judgment
given between two States by ICJ or another tribunal,
etc.). It is unnecessary to spell out these possibilities in
article 12, since the responsibility of a State is engaged
by the breach of an international obligation whatever the
particular origin of the obligation concerned. The formula
“regardless of its origin” refers to all possible sources of
international obligations, that is to say, to all processes for
creating legal obligations recognized by international law.
The word “source” is sometimes used in this context, as in
the preamble to the Charter of the United Nations which
stresses the need to respect “the obligations arising from
treaties and other sources of international law”. The word
194 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 46,
para. 57.
195 ELSI (see footnote 85 above), p. 50, para. 70.
196 Thus, France undertook by a unilateral act not to engage in
further atmospheric nuclear testing: Nuclear Tests (Australia v. France),
Judgment, I.C.J. Reports 1974, p. 253; Nuclear Tests (New Zealand
v. France), ibid., p. 457. The extent of the obligation thereby undertaken
was clarified in Request for an Examination of the Situation in 
Accordance with Paragraph 63 of the Court’s Judgment of 20 December
1974 in the Nuclear Tests (New Zealand v. France) Case, Order of 
22 September 1995, I.C.J. Reports 1995, p. 288.
“origin”, which has the same meaning, is not attended by
the doubts and doctrinal debates the term “source” has
provoked.
(4)  According to article 12, the origin or provenance of
an obligation does not, as such, alter the conclusion that
responsibility will be entailed if it is breached by a State,
nor does it, as such, affect the regime of State responsibility
thereby arising. Obligations may arise for a State by a
treaty and by a rule of customary international law or by
a treaty and a unilateral act.197 Moreover, these various
grounds of obligation interact with each other, as practice
clearly shows.Treaties, especially multilateral treaties, can
contribute to the formation of general international law;
customary law may assist in the interpretation of treaties;
an obligation contained in a treaty may be applicable to a
State by reason of its unilateral act, and so on. Thus, international
courts and tribunals have treated responsibility
as arising for a State by reason of any “violation of a duty
imposed by an international juridical standard”.198 In the
“RainbowWarrior” arbitration, the tribunal said that “any
violation by a State of any obligation, of whatever origin,
gives rise to State responsibility and consequently, to
the duty of reparation”.199 In the Gabˇcíkovo-Nagymaros
Project case, ICJ referred to the relevant draft article provisionally
adopted by the Commission in 1976 in support
of the proposition that it is “well established that, when a
State has committed an internationally wrongful act, its
international responsibility is likely to be involved whatever
the nature of the obligation it has failed to respect”.200
(5)  Thus, there is no room in international law for a distinction,
such as is drawn by some legal systems, between
the regime of responsibility for breach of a treaty and for
breach of some other rule, i.e. for responsibility arising
ex contractu or ex delicto. In the “Rainbow Warrior” arbitration,
the tribunal affirmed that “in the field of international
law there is no distinction between contractual
and tortious responsibility”.201 As far as the origin of the
obligation breached is concerned, there is a single general
regime of State responsibility. Nor does any distinction
exist between the “civil” and “criminal” responsibility as
is the case in internal legal systems.
(6)  State responsibility can arise from breaches of bilateral
obligations or of obligations owed to some States
197  ICJ has recognized “[t]he existence of identical rules in international
treaty law and customary law” on a number of occasions,
Military and Paramilitary Activities in and against Nicaragua
(see footnote 36 above), p. 95, para. 177; see also North Sea Continental
Shelf, Judgment, I.C.J. Reports 1969, p. 3, at pp. 38–39, para. 63.
198 Dickson Car Wheel Company (see footnote 42 above); cf. the
Goldenberg case, UNRIAA, vol. II (Sales No. 1949.V.1), p. 901, at
pp. 908–909 (1928); International Fisheries Company (footnote 43
above), p. 701 (“some principle of international law”); and Armstrong
Cork Company (footnote 45 above), p. 163 (“any rule whatsoever of
international law”).
199 “Rainbow Warrior” (see footnote 46 above), p. 251, para. 75.
See also Barcelona Traction (footnote 25 above), p. 46, para. 86
(“breach of an international obligation arising out of a treaty or a
general rule of law”).
200 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 38,
para. 47. The qualification “likely to be involved” may have been
inserted because of possible circumstances precluding wrongfulness in
that case.
201 “Rainbow Warrior” (see footnote 46 above), p. 251, para. 75.
56	 Report of the International Law Commission on the work of its fifty-third session
or to the international community as a whole. It can involve
relatively minor infringements as well as the most
serious breaches of obligations under peremptory norms
of general international law. Questions of the gravity of
the breach and the peremptory character of the obligation
breached can affect the consequences which arise for the
responsible State and, in certain cases, for other States
also. Certain distinctions between the consequences of
certain breaches are accordingly drawn in Parts Two and
Three of these articles.202 But the regime of State responsibility
for breach of an international obligation under Part
One is comprehensive in scope, general in character and
flexible in its application: Part One is thus able to cover
the spectrum of possible situations without any need for
further distinctions between categories of obligation concerned
or the category of the breach.
(7)  Even fundamental principles of the international legal
order are not based on any special source of law or
specific law-making procedure, in contrast with rules of
constitutional character in internal legal systems. In accordance
with article 53 of the 1969 Vienna Convention,
a peremptory norm of general international law is one
which is “accepted and recognized by the international
community of States as a whole as a norm from which no
derogation is permitted and which can be modified only
by a subsequent norm of general international law having
the same character”. Article 53 recognizes both that
norms of a peremptory character can be created and that
the States have a special role in this regard as par excellence
the holders of normative authority on behalf of the
international community. Moreover, obligations imposed
on States by peremptory norms necessarily affect the vital
interests of the international community as a whole and
may entail a stricter regime of responsibility than that applied
to other internationally wrongful acts. But this is
an issue belonging to the content of State responsibility.203
So far at least as Part One of the articles is concerned,
there is a unitary regime of State responsibility which is
general in character.
(8)  Rather similar considerations apply with respect to
obligations arising under the Charter of the United Nations.
Since the Charter is a treaty, the obligations it contains
are, from the point of view of their origin, treaty
obligations. The special importance of the Charter, as reflected
in its Article 103,204 derives from its express provisions
as well as from the virtually universal membership
of States in the United Nations.
(9)  The general scope of the articles extends not only to
the conventional or other origin of the obligation breached
but also to its subject matter. International awards and
decisions specifying the conditions for the existence of
an internationally wrongful act speak of the breach of an
international obligation without placing any restriction on
202 See Part Three, chapter II and commentary; see also article 48
and commentary.
203 See articles 40 and 41 and commentaries.
204 According to which “[i]n the event of a conflict between the
obligations of the Members of the United Nations under the present
Charter and their obligations under any other international agreement,
their obligations under the present Charter shall prevail”.
the subject matter of the obligation breached.205 Courts
and tribunals have consistently affirmed the principle that
there is no a priori limit to the subject matters on which
States may assume international obligations. Thus, PCIJ
stated in its first judgment, in the S.S. “Wimbledon” case,
that “the right of entering into international engagements
is an attribute of State sovereignty”.206 That proposition
has often been endorsed.207
(10)  In a similar perspective, it has sometimes been
argued that an obligation dealing with a certain subject
matter could only have been breached by conduct of the
same description. That proposition formed the basis of an
objection to the jurisdiction of ICJ in the Oil Platforms
case. It was argued that a treaty of friendship, commerce
and navigation could not in principle have been breached
by conduct involving the use of armed force. The Court
responded in the following terms:
The Treaty of 1955 imposes on each of the Parties various obligations
on a variety of matters. Any action by one of the Parties that is incompatible
with those obligations is unlawful, regardless of the means by
which it is brought about. A violation of the rights of one party under
the Treaty by means of the use of force is as unlawful as would be
a violation by administrative decision or by any other means. Matters
relating to the use of force are therefore not per se excluded from the
reach of the Treaty of 1955.208
Thus, the breach by a State of an international obligation
constitutes an internationally wrongful act, whatever the
subject matter or content of the obligation breached, and
whatever description may be given to the non-conforming
conduct.
(11)  Article 12 also states that there is a breach of an
international obligation when the act in question is not
in conformity with what is required by that obligation,
“regardless of its … character”. In practice, various classifications
of international obligations have been adopted.
For example, a distinction is commonly drawn between
obligations of conduct and obligations of result. That distinction
may assist in ascertaining when a breach has occurred.
But it is not exclusive,209 and it does not seem to
bear specific or direct consequences as far as the present
articles are concerned. In the Colozza case, for example,
the European Court of Human Rights was concerned with
the trial in absentia of a person who, without actual notice
of his trial, was sentenced to six years’ imprisonment and
was not allowed subsequently to contest his conviction.
205 See, e.g., Factory at Chorzów, Jurisdiction (footnote 34 above);
Factory at Chorzów, Merits (ibid.); and Reparation for Injuries 
(footnote 38 above). In these decisions it is stated that “any breach
of an international engagement” entails international responsibility.
See also Interpretation of Peace Treaties with Bulgaria, Hungary and
Romania (footnote 39 above), p. 228.
206 S.S. “Wimbledon” (see footnote 34 above), p. 25.
207 See, e.g., Nottebohm, Second Phase, Judgment, I.C.J. Reports
1955, p. 4, at pp. 20–21; Right of Passage over Indian Territory, Merits,
Judgment, I.C.J. Reports 1960, p. 6, at p. 33; and Military and Para- 
military Activities in and against Nicaragua (footnote 36 above),
p. 131, para. 259.
208 Oil Platforms (Islamic Republic of Iran v. United States of America),
Preliminary Objection, Judgment, I.C.J. Reports 1996, p. 803, at
pp. 811–812, para. 21.
209 Cf. Gabˇcíkovo-Nagymaros Project (footnote 27 above), p. 77,
para. 135, where the Court referred to the parties having accepted
“obligations of conduct, obligations of performance, and obligations
of result”.
	 State responsibility	 57
He claimed that he had not had a fair hearing, contrary
to article 6, paragraph 1, of the European Convention on
Human Rights. The Court noted that:
The Contracting States enjoy a wide discretion as regards the choice of
the means calculated to ensure that their legal systems are in compliance
with the requirements of article 6 § 1 in this field. The Court’s task
is not to indicate those means to the States, but to determine whether
the result called for by the Convention has been achieved ... For this to
be so, the resources available under domestic law must be shown to be
effective and a person “charged with a criminal offence” ... must not be
left with the burden of proving that he was not seeking to evade justice
or that his absence was due to force majeure.210
The Court thus considered that article 6, paragraph 1,
imposed an obligation of result.211 But, in order to decide
whether there had been a breach of the Convention
in the circumstances of the case, it did not simply compare
the result required (the opportunity for a trial in the
accused’s presence) with the result practically achieved
(the lack of that opportunity in the particular case). Rather,
it examined what more Italy could have done to make the
applicant’s right “effective”.212 The distinction between
obligations of conduct and result was not determinative
of the actual decision that there had been a breach of article
6, paragraph 1.213
(12)  The question often arises whether an obligation is
breached by the enactment of legislation by a State, in
cases where the content of the legislation prima facie conflicts
with what is required by the international obligation,
or whether the legislation has to be implemented in the
given case before the breach can be said to have occurred.
Again, no general rule can be laid down that is applicable
to all cases.214 Certain obligations may be breached by the
mere passage of incompatible legislation.215 Where this
is so, the passage of the legislation without more entails
the international responsibility of the enacting State, the
210 Colozza v. Italy, Eur. Court H.R., Series A, No. 89 (1985),
pp. 15–16, para. 30, citing De Cubber v. Belgium, ibid., No. 86 (1984),
p. 20, para. 35.
211 Cf. Plattform “Ärzte für das Leben” v. Austria, in which the
Court gave the following interpretation of article 11:
“While it is the duty of Contracting States to take reasonable and
appropriate measures to enable lawful demonstrations to proceed
peacefully, they cannot guarantee this absolutely and they have a
wide discretion in the choice of the means to be used … In this area
the obligation they enter into under article 11 of the Convention
is an obligation as to measures to be taken and not as to results to
be achieved” (Eur. Court H.R., Series A, No. 139, p. 12, para. 34
(1988)).
In the Colozza case (see footnote 210 above), the Court used similar
language but concluded that the obligation was an obligation of result.
Cf. C. Tomuschat, “What is a ‘breach’ of the European Convention on
Human Rights?”, The Dynamics of the Protection of Human Rights
in Europe: Essays in Honour of Henry G. Schermers, Lawson and
de Blois, eds. (Dordrecht, Martinus Nijhoff, 1994), vol. 3, p. 315, at
p. 328.
212 Colozza case (see footnote 210 above), para. 28.
213 See also The Islamic Republic of Iran v. The United States of
America, cases A15 (IV) and A24, Iran-U.S. C.T.R., vol. 32, p. 115
(1996).
214 Cf. Applicability of the Obligation to Arbitrate under Section 21
of the United Nations Headquarters Agreement of 26 June 1947 (footnote
83 above), p. 30, para. 42.
215 A uniform law treaty will generally be construed as requiring immediate
implementation, i.e. as embodying an obligation to make the
provisions of the uniform law a part of the law of each State party:
see, e.g., B. Conforti, “Obblighi di mezzi e obblighi di risultato nelle
convenzioni di diritto uniforme”, Rivista di diritto internazionale 
privato e processuale, vol. 24 (1988), p. 233.
legislature itself being an organ of the State for the purposes
of the attribution of responsibility.216 In other circumstances,
the enactment of legislation may not in and
of itself amount to a breach,217 especially if it is open to
the State concerned to give effect to the legislation in a
way which would not violate the international obligation
in question. In such cases, whether there is a breach will
depend on whether and how the legislation is given ef-
fect.218
Article 13.  International obligation in force for a State
An act of a State does not constitute a breach of an
international obligation unless the State is bound by
the obligation in question at the time the act occurs.
Commentary
(1)  Article 13 states the basic principle that, for responsibility
to exist, the breach must occur at a time when the
State is bound by the obligation.This is but the application
in the field of State responsibility of the general principle
of intertemporal law, as stated by Judge Huber in another
context in the Island of Palmas case:
[A] juridical fact must be appreciated in the light of the law contemporary
with it, and not of the law in force at the time when a dispute in
regard to it arises or falls to be settled.219
Article 13 provides an important guarantee for States in
terms of claims of responsibility. Its formulation (“does
not constitute … unless …”) is in keeping with the idea of
a guarantee against the retrospective application of international
law in matters of State responsibility.
(2)  International tribunals have applied the principle
stated in article 13 in many cases. An instructive example
is provided by the decision of Umpire Bates of the United
States-Great Britain Mixed Commission concerning the
216 See article 4 and commentary. For illustrations, see, e.g., the
findings of the European Court of Human Rights in Norris v. Ireland,
Eur. Court H.R., Series A, No. 142, para. 31 (1988), citing Klass and
Others v. Germany, ibid., No. 28, para. 33 (1978); Marckx v. Belgium,
ibid., No. 31, para. 27 (1979); Johnston and Others v. Ireland,
ibid., No. 112, para. 42 (1986); Dudgeon v. the United Kingdom, ibid., 
No. 45, para. 41 (1981); and Modinos v. Cyprus, ibid., No. 259, para.
24 (1993). See also International responsibility for the promulgation
and enforcement of laws in violation of the Convention (arts. 1 and 2
American Convention on Human Rights), Advisory Opinion OC–14/94,
Inter-American Court of Human Rights, Series A, No. 14 (1994).
The Inter-American Court also considered it possible to determine
whether draft legislation was compatible with the provisions of human
rights treaties: Restrictions to the Death Penalty (arts. 4(2) and 4(4)
American Convention on Human Rights), Advisory Opinion OC–3/83,
Series A, No. 3 (1983).
217 As ICJ held in LaGrand, Judgment (see footnote 119 above),
p. 497, paras. 90–91.
218 See, e.g., WTO, Report of the Panel (footnote 73 above),
paras. 7.34–7.57.
219 Island of Palmas (Netherlands/United States of America),
UNRIAA, vol. II (Sales No. 1949.V.1), p. 829, at p. 845 (1928).
Generally on intertemporal law, see resolution I adopted in 1975 by
the Institute of International Law at its Wiesbaden session, Annuaire
de l’Institut de droit international, vol. 56 (1975), pp. 536–540; for
the debate, ibid., pp. 339–374; for M. Sørensen’s reports, ibid., vol. 55
(1973), pp. 1–116. See further W. Karl, “The time factor in the law of
State responsibility”, Spinedi and Simma, eds., op. cit. (footnote 175
above), p. 95.
58	 Report of the International Law Commission on the work of its fifty-third session
conduct of British authorities who had seized United States
vessels engaged in the slave trade and freed slaves belonging
to United States nationals. The incidents referred to
the Commission had taken place at different times and the
umpire had to determine whether, at the time each incident
took place, slavery was “contrary to the law of nations”.
Earlier incidents, dating back to a time when the
slave trade was considered lawful, amounted to a breach
on the part of the British authorities of the international
obligation to respect and protect the property of foreign
nationals.220 The later incidents occurred when the slave
trade had been “prohibited by all civilized nations” and
did not involve the responsibility of Great Britain.221
(3)  Similar principles were applied by Arbitrator Asser
in deciding whether the seizure and confiscation by
Russian authorities of United States vessels engaged in
seal hunting outside Russia’s territorial waters should be
considered internationally wrongful. In his award in the
“James Hamilton Lewis” case, he observed that the question
had to be settled “according to the general principles
of the law of nations and the spirit of the international
agreements in force and binding upon the two High Parties
at the time of the seizure of the vessel”.222 Since, under
the principles in force at the time, Russia had no right
to seize the United States vessel, the seizure and confiscation
of the vessel were unlawful acts for which Russia was
required to pay compensation.223 The same principle has
consistently been applied by the European Commission
and the European Court of Human Rights to deny claims
relating to periods during which the European Convention
on Human Rights was not in force for the State con-
cerned.224
(4)  State practice also supports the principle. A requirement
that arbitrators apply the rules of international law
in force at the time when the alleged wrongful acts took
place is a common stipulation in arbitration agreements,225
and undoubtedly is made by way of explicit confirmation
of a generally recognized principle. International law
writers who have dealt with the question recognize that
the wrongfulness of an act must be established on the ba-
220 See the “Enterprize” case, Lapradelle-Politis (footnote 139
above), vol. I, p. 703 (1855); and Moore, History and Digest,
vol. IV, p. 4349, at p. 4373. See also the “Hermosa” and “Créole” cases,
Lapradelle-Politis, op. cit., p. 704 (1855); and Moore, History and 
Digest, vol. IV, pp. 4374–4375.
221 See the “Lawrence” case, Lapradelle-Politis, op. cit., p. 741; and
Moore, History and Digest, vol. III, p. 2824. See also the “Volusia”
case, Lapradelle-Politis, op. cit., p. 741.
222 Affaire des navires Cape Horn Pigeon, James Hamilton Lewis,
C. H. White et Kate and Anna, UNRIAA, vol. IX (Sales No. 59.V.5),
p. 66, at p. 69 (1902).
223 See also the “C. H. White” case, ibid., p. 74. In these cases the arbitrator
was required by the arbitration agreement itself to apply the law
in force at the time the acts were performed. Nevertheless, the intention
of the parties was clearly to confirm the application of the general
principle in the context of the arbitration agreement, not to establish
an exception. See further the S.S. “Lisman” case, ibid., vol. III (Sales
No. 1949.V.2), p. 1767, at p. 1771 (1937).
224 See, e.g., X v. Germany, application No. 1151/61, Council of
Europe, European Commission of Human Rights, Recueil des décisions,
No. 7 (March 1962), p. 119 (1961) and many later decisions.
225 See, e.g., Declarations exchanged between the Government of
the United States of America and the Imperial Government of Russia,
for the submission to arbitration of certain disputes concerning the
international responsibility of Russia for the seizure of American ships,
UNRIAA, vol. IX (Sales No. 59.V.5), p. 57 (1900).
sis of the obligations in force at the time when the act was
performed.226
(5)  State responsibility can extend to acts of the utmost
seriousness, and the regime of responsibility in such cases
will be correspondingly stringent. But even when a new
peremptory norm of general international law comes
into existence, as contemplated by article 64 of the 1969
Vienna Convention, this does not entail any retrospective
assumption of responsibility. Article 71, paragraph 2 (b),
provides that such a new peremptory norm “does not affect
any right, obligation or legal situation of the parties
created through the execution of the treaty prior to its termination,
provided that those rights, obligations or situations
may thereafter be maintained only to the extent that
their maintenance is not in itself in conflict with the new
peremptory norm”.
(6)  Accordingly, it is appropriate to apply the intertemporal
principle to all international obligations, and article
13 is general in its application. It is, however, without
prejudice to the possibility that a State may agree
to compensate for damage caused as a result of conduct
which was not at the time a breach of any international
obligation in force for that State. In fact, cases of the retrospective
assumption of responsibility are rare. The lex
specialis principle (art. 55) is sufficient to deal with any
such cases where it may be agreed or decided that responsibility
will be assumed retrospectively for conduct which
was not a breach of an international obligation at the time
it was committed.227
(7)  In international law, the principle stated in article
13 is not only a necessary but also a sufficient basis for
responsibility. In other words, once responsibility has accrued
as a result of an internationally wrongful act, it is
not affected by the subsequent termination of the obligation,
whether as a result of the termination of the treaty
which has been breached or of a change in international
law. Thus, as ICJ said in the Northern Cameroons case:
[I]f during the life of the Trusteeship the Trustee was responsible for
some act in violation of the terms of the Trusteeship Agreement which
resulted in damage to another Member of the United Nations or to one
of its nationals, a claim for reparation would not be liquidated by the
termination of the Trust.228
Similarly, in the “Rainbow Warrior” arbitration, the arbitral
tribunal held that, although the relevant treaty obli-
226 See, e.g., P. Tavernier, Recherches sur l’application dans le temps
des actes et des règles en droit international public: problèmes de droit
intertemporel ou de droit transitoire (Paris, Librairie générale de droit
et de jurisprudence, 1970), pp. 119, 135 and 292; D. Bindschedler-Robert,
“De la rétroactivité en droit international public”, Recueil d’études
de droit international en hommage à Paul Guggenheim (University of
Geneva Law Faculty/Graduate Institute of International Studies, 1968),
p. 184; M. Sørensen, “Le problème intertemporel dans l’application de
la Convention européenne des droits de l’homme”, Mélanges offerts
à Polys Modinos (Paris, Pedone, 1968), p. 304; T. O. Elias, “The doctrine
of intertemporal law”, AJIL, vol. 74, No. 2 (April 1980), p. 285;
and R. Higgins, “Time and the law: international perspectives on an
old problem”, International and Comparative Law Quarterly, vol. 46
(July 1997), p. 501.
227 As to the retroactive effect of the acknowledgement and adoption
of conduct by a State, see article 11 and commentary, especially
paragraph (4). Such acknowledgement and adoption would not, without
more, give retroactive effect to the obligations of the adopting State.
228 Northern Cameroons, Preliminary Objections, Judgment, I.C.J.
Reports 1963, p. 15, at p. 35.
	 State responsibility	 59
gation had terminated with the passage of time, France’s
responsibility for its earlier breach remained.229
(8)  Both aspects of the principle are implicit in the ICJ
decision in the Certain Phosphate Lands in Nauru case.
Australia argued there that a State responsibility claim relating
to the period of its joint administration of the Trust
Territory for Nauru (1947–1968) could not be brought
decades later, even if the claim had not been formally
waived. The Court rejected the argument, applying a liberal
standard of laches or unreasonable delay.230 But it
went on to say that:
[I]t will be for the Court, in due time, to ensure that Nauru’s delay in
seising [sic] it will in no way cause prejudice to Australia with regard to
both the establishment of the facts and the determination of the content
of the applicable law.231
Evidently, the Court intended to apply the law in force at
the time the claim arose. Indeed that position was necessarily
taken by Nauru itself, since its claim was based on
a breach of the Trusteeship Agreement, which terminated
at the date of its accession to independence in 1968. Its
claim was that the responsibility of Australia, once engaged
under the law in force at a given time, continued
to exist even if the primary obligation had subsequently
terminated.232
(9)  The basic principle stated in article 13 is thus well
established. One possible qualification concerns the progressive
interpretation of obligations, by a majority of
the Court in the Namibia case.233 But the intertemporal
principle does not entail that treaty provisions are to be
interpreted as if frozen in time. The evolutionary interpre-
tationoftreatyprovisionsispermissibleincertaincases,234
but this has nothing to do with the principle that a State
can only be held responsible for breach of an obligation
which was in force for that State at the time of its conduct.
Nor does the principle of the intertemporal law mean that
facts occurring prior to the entry into force of a particular
obligation may not be taken into account where these are
otherwise relevant. For example, in dealing with the obligation
to ensure that persons accused are tried without undue
delay, periods of detention prior to the entry into force
of that obligation may be relevant as facts, even though no
compensation could be awarded in respect of the period
prior to the entry into force of the obligation.235
229 “Rainbow Warrior” (see footnote 46 above), pp. 265–266.
230 Certain Phosphate Lands in Nauru (Nauru v. Australia), Preliminary
Objections, Judgment, I.C.J. Reports 1992, p. 240, at pp. 253–255,
paras. 31–36. See article 45, subparagraph (b), and commentary.
231 Certain Phosphate Lands in Nauru, ibid., p. 255, para. 36.
232 The case was settled before the Court had the opportunity to consider
the merits: Certain Phosphate Lands in Nauru, Order of 13 September
1993, I.C.J. Reports 1993, p. 322; for the settlement agreement,
see Agreement between Australia and the Republic of Nauru for the
Settlement of the Case in the International Court of Justice concerning
Certain Phosphate Lands in Nauru (Nauru, 10 August 1993) (United
Nations, Treaty Series, vol. 1770, No. 30807, p. 379).
233 Namibia case (see footnote 176 above), pp. 31–32, para. 53.
234 See, e.g., Tyrer v. the United Kingdom, Eur. Court H.R., Series A,
No. 26, pp. 15–16 (1978).
235 See, e.g., Zana v. Turkey, Eur. Court H.R., Reports, 1997–VII,
p. 2533 (1997); and J. Pauwelyn, “The concept of a ‘continuing violation’
of an international obligation: selected problems”, BYBIL, 1995,
vol. 66, p. 415, at pp. 443–445.
Article 14.  Extension in time of the breach
of an international obligation
1.  The breach of an international obligation by an
act of a State not having a continuing character occurs
at the moment when the act is performed, even if its
effects continue.
2.  The breach of an international obligation by an
act of a State having a continuing character extends
over the entire period during which the act continues
and remains not in conformity with the international
obligation.
3.  The breach of an international obligation requiring
a State to prevent a given event occurs when
the event occurs and extends over the entire period
during which the event continues and remains not in
conformity with that obligation.
Commentary
(1)  The problem of identifying when a wrongful act
begins and how long it continues is one which arises
frequently236 and has consequences in the field of State
responsibility, including the important question of cessation
of continuing wrongful acts dealt with in article 30.
Although the existence and duration of a breach of an
international obligation depends for the most part on the
existence and content of the obligation and on the facts
of the particular breach, certain basic concepts are established.
These are introduced in article 14. Without seeking
to be comprehensive in its treatment of the problem, article
14 deals with several related questions. In particular, it
develops the distinction between breaches not extending
in time and continuing wrongful acts (see paragraphs (1)
and (2) respectively), and it also deals with the application
of that distinction to the important case of obligations of
prevention. In each of these cases it takes into account
the question of the continuance in force of the obligation
breached.
(2)  Internationally wrongful acts usually take some time
to happen. The critical distinction for the purpose of article
14 is between a breach which is continuing and one
which has already been completed. In accordance with
paragraph 1, a completed act occurs “at the moment
when the act is performed”, even though its effects or
consequences may continue. The words “at the moment”
are intended to provide a more precise description of the
time frame when a completed wrongful act is performed,
236 See, e.g., Mavrommatis Palestine Concessions, Judgment No. 2,
1924, P.C.I.J., Series A, No. 2, p. 35; Phosphates in Morocco (footnote
34 above), pp. 23–29; Electricity Company of Sofia and Bulgaria,
Judgment, 1939, P.C.I.J., Series A/B, No. 77, p. 64, at pp. 80–82;
and Right of Passage over Indian Territory (footnote 207 above),
pp. 33–36. The issue has often been raised before the organs of the
European Convention on Human Rights. See, e. g., the decision of the
European Commission of Human Rights in the De Becker v. Belgium
case, application No. 214/56, Yearbook of the European Convention on
Human Rights, 1958–1959, p. 214, at pp. 234 and 244; and the Court’s
judgments in Ireland v. the United Kingdom, Eur. Court H.R., Series
A, No. 25, p. 64 (1978); Papamichalopoulos and Others v. Greece,
ibid., No. 260–B, para. 40 (1993); and Agrotexim and Others v. Greece,
ibid., No. 330–A, p. 22, para. 58 (1995). See also E. Wyler, “Quelques
réflexions sur la réalisation dans le temps du fait internationalement
illicite”, RGDIP, vol. 95, p. 881 (1991).
60	 Report of the International Law Commission on the work of its fifty-third session
without requiring that the act necessarily be completed in
a single instant.
(3)  In accordance with paragraph 2, a continuing
wrongful act, on the other hand, occupies the entire period
during which the act continues and remains not in
conformity with the international obligation, provided
that the State is bound by the international obligation during
that period.237 Examples of continuing wrongful acts
include the maintenance in effect of legislative provisions
incompatible with treaty obligations of the enacting State,
unlawful detention of a foreign official or unlawful occupation
of embassy premises, maintenance by force of
colonial domination, unlawful occupation of part of the
territory of another State or stationing armed forces in another
State without its consent.
(4)  Whether a wrongful act is completed or has a continuing
character will depend both on the primary obligation
and the circumstances of the given case. For example,
the Inter-American Court of Human Rights has
interpreted forced or involuntary disappearance as a continuing
wrongful act, one which continues for as long as
the person concerned is unaccounted for.238 The question
whether a wrongful taking of property is a completed or
continuing act likewise depends to some extent on the content
of the primary rule said to have been violated. Where
an expropriation is carried out by legal process, with the
consequence that title to the property concerned is transferred,
the expropriation itself will then be a completed
act. The position with a de facto, “creeping” or disguised
occupation, however, may well be different.239 Exceptionally,
a tribunal may be justified in refusing to recognize a
law or decree at all, with the consequence that the resulting
denial of status, ownership or possession may give rise
to a continuing wrongful act.240
(5)  Moreover, the distinction between completed and
continuing acts is a relative one. A continuing wrongful
act itself can cease: thus a hostage can be released, or the
body of a disappeared person returned to the next of kin.
In essence, a continuing wrongful act is one which has
been commenced but has not been completed at the relevant
time. Where a continuing wrongful act has ceased,
for example by the release of hostages or the withdrawal
of forces from territory unlawfully occupied, the act is
considered for the future as no longer having a continuing
character, even though certain effects of the act may
continue. In this respect, it is covered by paragraph 1 of
article 14.
(6)  An act does not have a continuing character merely
because its effects or consequences extend in time.
It must be the wrongful act as such which continues. In
many cases of internationally wrongful acts, their consequences
may be prolonged. The pain and suffering caused
by earlier acts of torture or the economic effects of the
expropriation of property continue even though the torture
has ceased or title to the property has passed. Such
237 See article 13 and commentary, especially para. (2).
238 Blake, Inter-American Court of Human Rights, Series C, No. 36,
para. 67 (1998).
239 Papamichalopoulos (see footnote 236 above).
240 Loizidou, Merits (see footnote 160 above), p. 2216.
consequences are the subject of the secondary obligations
of reparation, including restitution, as required by Part
Two of the articles. The prolongation of such effects will
be relevant, for example, in determining the amount of
compensation payable. They do not, however, entail that
the breach itself is a continuing one.
(7)  The notion of continuing wrongful acts is common
to many national legal systems and owes its origins in
international law to Triepel.241 It has been repeatedly referred
to by ICJ and by other international tribunals. For
example, in the United States Diplomatic and Consular
Staff in Tehran case, the Court referred to “successive and
still continuing breaches by Iran of its obligations to the
United States under the Vienna Conventions of 1961 and
1963”.242
(8)  The consequences of a continuing wrongful act
will depend on the context, as well as on the duration
of the obligation breached. For example, the “Rainbow
Warrior” arbitration involved the failure of France to detain
two agents on the French Pacific island of Hao for a
period of three years, as required by an agreement between
France and New Zealand. The arbitral tribunal referred
with approval to the Commission’s draft articles (now
amalgamated in article 14) and to the distinction between
instantaneous and continuing wrongful acts, and said:
Applying this classification to the present case, it is clear that the
breach consisting in the failure of returning to Hao the two agents has
been not only a material but also a continuous breach. And this classification
is not purely theoretical, but, on the contrary, it has practical
consequences, since the seriousness of the breach and its prolongation
in time cannot fail to have considerable bearing on the establishment
of the reparation which is adequate for a violation presenting these two
features.243
The tribunal went on to draw further legal consequences
from the distinction in terms of the duration of French
obligations under the agreement.244
(9)  The notion of continuing wrongful acts has also been
applied by the European Court of Human Rights to establish
its jurisdiction ratione temporis in a series of cases.
The issue arises because the Court’s jurisdiction may be
limited to events occurring after the respondent State became
a party to the Convention or the relevant Protocol
and accepted the right of individual petition. Thus, in the
Papamichalopoulos case, a seizure of property not involving
formal expropriation occurred some eight years
before Greece recognized the Court’s competence. The
Court held that there was a continuing breach of the right
to peaceful enjoyment of property under article 1 of the
Protocol to the European Convention on Human Rights,
241 H. Triepel, Völkerrecht und Landesrecht (Leipzig, Hirschfeld,
1899), p. 289. The concept was subsequently taken up in various
general studies on State responsibility as well as in works on the interpretation
of the formula “situations or facts prior to a given date” used
in some declarations of acceptance of the compulsory jurisdiction of
ICJ.
242 United States Diplomatic and Consular Staff in Tehran (see
footnote 59 above), p. 37, para. 80. See also pages 36–37, paras. 78–
79.
243 “Rainbow Warrior” (see footnote 46 above), p. 264, para. 101.
244 Ibid., pp. 265–266, paras. 105–106. But see the separate opinion
of Sir Kenneth Keith, ibid., pp. 279–284.
	 State responsibility	 61
which continued after the Protocol had come into force; it
accordingly upheld its jurisdiction over the claim.245
(10)  In the Loizidou case,246 similar reasoning was
applied by the Court to the consequences of the Turkish
invasion of Cyprus in 1974, as a result of which the
applicant was denied access to her property in northern
Cyprus. Turkey argued that under article 159 of the Constitution
of the Turkish Republic of Northern Cyprus
of 1985, the property in question had been expropriated,
and this had occurred prior to Turkey’s acceptance
of the Court’s jurisdiction in 1990. The Court held that,
in accordance with international law and having regard
to the relevant Security Council resolutions, it could not
attribute legal effect to the 1985 Constitution so that the
expropriation was not completed at that time and the property
continued to belong to the applicant. The conduct of
the Turkish Republic and of Turkish troops in denying the
applicant access to her property continued after Turkey’s
acceptance of the Court’s jurisdiction, and constituted a
breach of article 1 of the Protocol to the European Convention
on Human Rights after that time.247
(11)  The Human Rights Committee has likewise endorsed
the idea of continuing wrongful acts. For example,
in Lovelace, it held it had jurisdiction to examine the
continuing effects for the applicant of the loss of her status
as a registered member of an Indian group, although
the loss had occurred at the time of her marriage in 1970
and Canada only accepted the Committee’s jurisdiction in
1976. The Committee noted that it was:
not competent, as a rule, to examine allegations relating to events having
taken place before the entry into force of the Covenant and the
Optional Protocol … In the case of Sandra Lovelace it follows that the
Committee is not competent to express any view on the original cause
of her loss of Indian status … at the time of her marriage in 1970 …
The Committee recognizes, however, that the situation may be different
if the alleged violations, although relating to events occurring
before 19 August 1976, continue, or have effects which themselves
constitute violations, after that date.248
It found that the continuing impact of Canadian legislation,
in preventing Lovelace from exercising her rights
as a member of a minority, was sufficient to constitute a
breach of article 27 of the International Covenant on Civil
and Political Rights after that date. Here the notion of a
continuing breach was relevant not only to the Committee’s
jurisdiction but also to the application of article 27
as the most directly relevant provision of the Covenant to
the facts in hand.
(12)  Thus, conduct which has commenced some time in
the past, and which constituted (or, if the relevant primary
rule had been in force for the State at the time, would have
245 See footnote 236 above.
246 Loizidou, Merits (see footnote 160 above), p. 2216.
247 Ibid., pp. 2230–2232 and 2237–2238, paras. 41–47 and 63–64.
See, however, the dissenting opinion of Judge Bernhardt, p. 2242,
para. 2 (with whom Judges Lopes Rocha, Jambrek, Pettiti, Baka and
Gölcüklü in substance agreed). See also Loizidou, Preliminary Objections
(footnote 160 above), pp. 33–34, paras. 102–105; and Cyprus
v. Turkey, application No. 25781/94, judgement of 10 May 2001,
Eur. Court H.R., Reports, 2001–IV.
248 Lovelace v. Canada, Official Records of the General Assembly,
Thirty-sixth Session, Supplement No. 40 (A/36/40), annex XVIII,
communication No. R.6/24, p. 172, paras. 10–11 (1981).
constituted) a breach at that time, can continue and give
rise to a continuing wrongful act in the present. Moreover,
this continuing character can have legal significance for
various purposes, including State responsibility. For example,
the obligation of cessation contained in article 30
applies to continuing wrongful acts.
(13)  A question common to wrongful acts whether completed
or continuing is when a breach of international law
occurs, as distinct from being merely apprehended or imminent.
As noted in the context of article 12, that question
can only be answered by reference to the particular primary
rule. Some rules specifically prohibit threats of conduct,249
incitement or attempt,250 in which case the threat,
incitement or attempt is itself a wrongful act. On the other
hand, where the internationally wrongful act is the occurrence
of some event—e.g. the diversion of an international
river—mere preparatory conduct is not necessarily
wrongful.251 In the Gabˇcíkovo-Nagymaros Project case,
the question was when the diversion scheme (“Variant C”)
was put into effect. ICJ held that the breach did not occur
until the actual diversion of the Danube. It noted:
that between November 1991 and October 1992, Czechoslovakia confined
itself to the execution, on its own territory, of the works which
were necessary for the implementation of Variant C, but which could
have been abandoned if an agreement had been reached between the
parties and did not therefore predetermine the final decision to be taken.
For as long as the Danube had not been unilaterally dammed, Variant C
had not in fact been applied.
Such a situation is not unusual in international law or, for that matter,
in domestic law. A wrongful act or offence is frequently preceded by
preparatory actions which are not to be confused with the act or offence
itself. It is as well to distinguish between the actual commission of a
wrongful act (whether instantaneous or continuous) and the conduct
prior to that act which is of a preparatory character and which “does not
qualify as a wrongful act”. 252
Thus, the Court distinguished between the actual commission
of a wrongful act and conduct of a preparatory
character. Preparatory conduct does not itself amount to a
249 Notably, Article 2, paragraph 4, of the Charter of the United
Nations prohibits “the threat or use of force against the territorial
integrity or political independence of any state”. For the question of
what constitutes a threat of force, see Legality of the Threat or Use of
Nuclear Weapons (footnote 54 above), pp. 246–247, paras. 47–48; see
also R. Sadurska, “Threats of force”, AJIL, vol. 82, No. 2 (April 1988),
p. 239.
250 A particularly comprehensive formulation is that of article III
of the Convention on the Prevention and Punishment of the Crime of
Genocide which prohibits conspiracy, direct and public incitement,
attempt and complicity in relation to genocide. See also article 2 of
the International Convention for the Suppression of Terrorist Bombings
and article 2 of the International Convention for the Suppression of the
Financing of Terrorism.
251 In some legal systems, the notion of “anticipatory breach” is used
to deal with the definitive refusal by a party to perform a contractual
obligation, in advance of the time laid down for its performance.
Confronted with an anticipatory breach, the party concerned is entitled
to terminate the contract and sue for damages. See K. Zweigert and
H. Kötz, Introduction to Comparative Law, 3rd rev. ed., trans. T. Weir
(Oxford, Clarendon Press, 1998), p. 508. Other systems achieve similar
results without using this concept, e.g. by construing a refusal to perform
in advance of the time for performance as a “positive breach of
contract”, ibid., p. 494 (German law). There appears to be no equivalent
in international law, but article 60, paragraph 3 (a), of the 1969 Vienna
Convention defines a material breach as including “a repudiation … not
sanctioned by the present Convention”. Such a repudiation could occur
in advance of the time for performance.
252 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 54,
para. 79, citing the draft commentary to what is now article 30.
62	 Report of the International Law Commission on the work of its fifty-third session
breach if it does not “predetermine the final decision to be
taken”. Whether that is so in any given case will depend
on the facts and on the content of the primary obligation.
There will be questions of judgement and degree, which it
is not possible to determine in advance by the use of any
particular formula. The various possibilities are intended
to be covered by the use of the term “occurs” in paragraphs
1 and 3 of article 14.
(14)  Paragraph 3 of article 14 deals with the temporal
dimensions of a particular category of breaches of international
obligations, namely the breach of obligations
to prevent the occurrence of a given event. Obligations
of prevention are usually construed as best efforts obligations,
requiring States to take all reasonable or necessary
measures to prevent a given event from occurring,
but without warranting that the event will not occur. The
breach of an obligation of prevention may well be a continuing
wrongful act, although, as for other continuing
wrongful acts, the effect of article 13 is that the breach
only continues if the State is bound by the obligation for
the period during which the event continues and remains
not in conformity with what is required by the obligation.
For example, the obligation to prevent transboundary
damage by air pollution, dealt with in the Trail Smelter
arbitration,253 was breached for as long as the pollution
continued to be emitted. Indeed, in such cases the breach
may be progressively aggravated by the failure to suppress
it. However, not all obligations directed to preventing an
act from occurring will be of this kind. If the obligation
in question was only concerned to prevent the happening
of the event in the first place (as distinct from its continuation),
there will be no continuing wrongful act.254 If the
obligation in question has ceased, any continuing conduct
by definition ceases to be wrongful at that time.255 Both
qualifications are intended to be covered by the phrase
in paragraph 3, “and remains not in conformity with that
obligation”.
Article 15.  Breach consisting of a composite act
1.  The breach of an international obligation by a
State through a series of actions or omissions defined
in aggregate as wrongful occurs when the action or
omission occurs which, taken with the other actions or
omissions, is sufficient to constitute the wrongful act.
2.  In such a case, the breach extends over the
entire period starting with the first of the actions or
omissions of the series and lasts for as long as these
actions or omissions are repeated and remain not in
conformity with the international obligation.
253 Trail Smelter, UNRIAA, vol. III (Sales No. 1949.V.2), p. 1905
(1938, 1941).
254 An example might be an obligation by State A to prevent certain
information from being published. The breach of such an obligation
will not necessarily be of a continuing character, since it may be that
once the information is published, the whole point of the obligation is
defeated.
255 See the “Rainbow Warrior” case (footnote 46 above), p. 266.
Commentary
(1)  Within the basic framework established by the distinction
between completed and continuing acts in article
14, article 15 deals with a further refinement, viz. the
notion of a composite wrongful act. Composite acts give
rise to continuing breaches, which extend in time from the
first of the actions or omissions in the series of acts making
up the wrongful conduct.
(2)  Composite acts covered by article 15 are limited to
breaches of obligations which concern some aggregate of
conduct and not individual acts as such. In other words,
their focus is “a series of acts or omissions defined in aggregate
as wrongful”. Examples include the obligations
concerning genocide, apartheid or crimes against humanity,
systematic acts of racial discrimination, systematic
acts of discrimination prohibited by a trade agreement,
etc. Some of the most serious wrongful acts in international
law are defined in terms of their composite character.
The importance of these obligations in international
law justifies special treatment in article 15.256
(3)  Even though it has special features, the prohibition
of genocide, formulated in identical terms in the Convention
on the Prevention and Punishment of the Crime of
Genocide and in later instruments,257 may be taken as an
illustration of a “composite” obligation. It implies that the
responsible entity (including a State) will have adopted a
systematic policy or practice. According to article II, subparagraph
(a), of the Convention, the prime case of genocide
is “[k]illing members of the [national, ethnical, racial
or religious] group” with the intent to destroy that group
as such, in whole or in part. Both limbs of the definition
contain systematic elements. Genocide has also to be carried
out with the relevant intention, aimed at physically
eliminating the group “as such”. Genocide is not committed
until there has been an accumulation of acts of killing,
causing harm, etc., committed with the relevant intent, so
as to satisfy the definition in article II. Once that threshold
is crossed, the time of commission extends over the whole
period during which any of the acts was committed, and
any individual responsible for any of them with the relevant
intent will have committed genocide.258
(4)  It is necessary to distinguish composite obligations
from simple obligations breached by a “composite”
act. Composite acts may be more likely to give rise to
256 See further J. J. A. Salmon, “Le fait étatique complexe: une
notion contestable”, Annuaire français de droit international, vol. 28
(1982), p. 709.
257 See, e.g., article 4 of the statute of the International Tribunal for
the Former Yugoslavia, originally published as an annex to document
S/25704 and Add.1, approved by the Security Council in its resolution
827 (1993) of 25 May 1993, and amended on 13 May 1998 by
resolution 1166 (1998) and on 30 November 2000 by resolution 1329
(2000); article 2 of the statute of the International Tribunal for Rwanda,
approved by the Security Council in its resolution 955 (1994) of
8 November 1994; and article 6 of the Rome Statute of the International
Criminal Court.
258 The intertemporal principle does not apply to the Convention,
which according to its article I is declaratory. Thus, the obligation to
prosecute relates to genocide whenever committed. See Application
of the Convention on the Prevention and Punishment of the Crime of
Genocide, Preliminary Objections (footnote 54 above), p. 617,
para. 34.
	 State responsibility	 63
continuing breaches, but simple acts can cause continuing
breaches as well. The position is different, however, where
the obligation itself is defined in terms of the cumulative
character of the conduct, i.e. where the cumulative
conduct constitutes the essence of the wrongful act. Thus,
apartheid is different in kind from individual acts of racial
discrimination, and genocide is different in kind from
individual acts even of ethnically or racially motivated
killing.
(5)  In Ireland v. the United Kingdom, Ireland complained
of a practice of unlawful treatment of detainees in
Northern Ireland which was said to amount to torture or
inhuman or degrading treatment, and the case was held to
be admissible on that basis. This had various procedural
and remedial consequences. In particular, the exhaustion
of local remedies rule did not have to be complied with in
relation to each of the incidents cited as part of the practice.
But the Court denied that there was any separate wrongful
act of a systematic kind involved. It was simply that
Ireland was entitled to complain of a practice made up by
a series of breaches of article VII of the Convention on the
Prevention and Punishment of the Crime of Genocide,
and to call for its cessation. As the Court said:
A practice incompatible with the Convention consists of an accumulation
of identical or analogous breaches which are sufficiently numerous
and inter-connected to amount not merely to isolated incidents or exceptions
but to a pattern or system; a practice does not of itself constitute a
violation separate from such breaches* ...
The concept of practice is of particular importance for the operation
of the rule of exhaustion of domestic remedies. This rule, as embodied
in Article 26 of the Convention, applies to State applications ... in the
same way as it does to “individual” applications ... On the other hand
and in principle, the rule does not apply where the applicant State complains
of a practice as such, with the aim of preventing its continuation
or recurrence, but does not ask the Commission or the Court to give a
decision on each of the cases put forward as proof or illustrations of
that practice.259
In the case of crimes against humanity, the composite act
is a violation separate from the individual violations of
human rights of which it is composed.
(6)  A further distinction must be drawn between the
necessary elements of a wrongful act and what might be
required by way of evidence or proof that such an act has
occurred. For example, an individual act of racial discrimination
by a State is internationally wrongful,260 even
though it may be necessary to adduce evidence of a series
of acts by State officials (involving the same person or
other persons similarly situated) in order to show that any
one of those acts was discriminatory rather than actuated
by legitimate grounds. In its essence such discrimination
is not a composite act, but it may be necessary for the
purposes of proving it to produce evidence of a practice
amounting to such an act.
259 Ireland v. the United Kingdom (see footnote 236 above), p. 64,
para. 159; see also page 63, para. 157. See further the United States
counterclaim in Oil Platforms (Islamic Republic of Iran v. United States
of America), Counter-Claim, Order of 10 March 1998, I.C.J. Reports
1998, p. 190, which likewise focuses on a general situation rather than
specific instances.
260 See, e.g., article 2 of the International Convention on the Elimination
of All Forms of Racial Discrimination; and article 26 of the International
Covenant on Civil and Political Rights.
(7)  A consequence of the character of a composite act
is that the time when the act is accomplished cannot be
the time when the first action or omission of the series
takes place. It is only subsequently that the first action or
omission will appear as having, as it were, inaugurated
the series. Only after a series of actions or omissions takes
place will the composite act be revealed, not merely as a
succession of isolated acts, but as a composite act, i.e. an
act defined in aggregate as wrongful.
(8)  Paragraph 1 of article 15 defines the time at which a
composite act “occurs” as the time at which the last action
or omission occurs which, taken with the other actions
or omissions, is sufficient to constitute the wrongful act,
without it necessarily having to be the last in the series.
Similar considerations apply as for completed and continuing
wrongful acts in determining when a breach of
international law exists; the matter is dependent upon the
precise facts and the content of the primary obligation.
The number of actions or omissions which must occur to
constitute a breach of the obligation is also determined by
the formulation and purpose of the primary rule. The actions
or omissions must be part of a series but the article
does not require that the whole series of wrongful acts
has to be committed in order to fall into the category of
a composite wrongful act, provided a sufficient number
of acts has occurred to constitute a breach. At the time
when the act occurs which is sufficient to constitute the
breach it may not be clear that further acts are to follow
and that the series is not complete. Further, the fact that
the series of actions or omissions was interrupted so that
it was never completed will not necessarily prevent those
actions or omissions which have occurred being classified
as a composite wrongful act if, taken together, they are
sufficient to constitute the breach.
(9)  While composite acts are made up of a series of actions
or omissions defined in aggregate as wrongful, this
does not exclude the possibility that every single act in
the series could be wrongful in accordance with another
obligation. For example, the wrongful act of genocide is
generally made up of a series of acts which are themselves
internationally wrongful. Nor does it affect the temporal
element in the commission of the acts: a series of acts or
omissions may occur at the same time or sequentially, at
different times.
(10)  Paragraph 2 of article 15 deals with the extension
in time of a composite act. Once a sufficient number of
actions or omissions has occurred, producing the result of
the composite act as such, the breach is dated to the first
of the acts in the series. The status of the first action or
omission is equivocal until enough of the series has occurred
to constitute the wrongful act; but at that point the
act should be regarded as having occurred over the whole
period from the commission of the first action or omission.
If this were not so, the effectiveness of the prohibition
would thereby be undermined.
(11)  The word “remain” in paragraph 2 is inserted to
deal with the intertemporal principle set out in article 13.
In accordance with that principle, the State must be bound
by the international obligation for the period during which
the series of acts making up the breach is committed. In
64	 Report of the International Law Commission on the work of its fifty-third session
cases where the relevant obligation did not exist at the
beginning of the course of conduct but came into being
thereafter, the “first” of the actions or omissions of the
series for the purposes of State responsibility will be the
first occurring after the obligation came into existence.
This need not prevent a court taking into account earlier
actions or omissions for other purposes (e.g. in order to
establish a factual basis for the later breaches or to provide
evidence of intent).
Chapter IV
RESPONSIBILITY OF A STATE IN CONNECTION
WITH THE ACT OF ANOTHER STATE
Commentary
(1)  In accordance with the basic principles laid down
in chapter I, each State is responsible for its own internationally
wrongful conduct, i.e. for conduct attributable to
it under chapter II which is in breach of an international
obligation of that State in accordance with chapter III.261
The principle that State responsibility is specific to the
State concerned underlies the present articles as a whole.
It will be referred to as the principle of independent responsibility.
It is appropriate since each State has its own
range of international obligations and its own correlative
responsibilities.
(2)  However, internationally wrongful conduct often results
from the collaboration of several States rather than
of one State acting alone.262 This may involve independent
conduct by several States, each playing its own role
in carrying out an internationally wrongful act. Or it may
be that a number of States act through a common organ to
commit a wrongful act.263 Internationally wrongful conduct
can also arise out of situations where a State acts
on behalf of another State in carrying out the conduct in
question.
(3)  Various forms of collaborative conduct can coexist
in the same case. For example, three States, Australia,
New Zealand and the United Kingdom, together constituted
the Administering Authority for the Trust Territory
of Nauru. In the Certain Phosphate Lands in Nauru case,
proceedings were commenced against Australia alone
in respect of acts performed on the “joint behalf” of the
261 See, in particular, article 2 and commentary.
262 See M. L. Padelletti, Pluralità di Stati nel Fatto Illecito Internazionale
(Milan, Giuffrè, 1990); Brownlie, System of the Law of Nations
… (footnote 92 above), pp. 189–192; J. Quigley, “Complicity in international
law: a new direction in the law of State responsibility”, BYBIL,
1986, vol. 57, p. 77; J. E. Noyes and B. D. Smith, “State responsibility
and the principle of joint and several liability”, Yale Journal of International
Law, vol. 13 (1988), p. 225; and B. Graefrath, “Complicity in the
law of international responsibility”, Revue belge de droit international,
vol. 29 (1996), p. 370.
263 In some cases, the act in question may be committed by the
organs of an international organization. This raises issues of the
international responsibility of international organizations which fall
outside the scope of the present articles. See article 57 and com-
mentary.
three States.264 The acts performed by Australia involved
both “joint” conduct of several States and day-to-day administration
of a territory by one State acting on behalf of
other States as well as on its own behalf. By contrast, if
the relevant organ of the acting State is merely “placed at
the disposal” of the requesting State, in the sense provided
for in article 6, only the requesting State is responsible for
the act in question.
(4)  In certain circumstances the wrongfulness of a
State’s conduct may depend on the independent action of
another State. A State may engage in conduct in a situation
where another State is involved and the conduct of
the other State may be relevant or even decisive in assessing
whether the first State has breached its own international
obligations. For example, in the Soering case the
European Court of Human Rights held that the proposed
extradition of a person to a State not party to the European
Convention on Human Rights where he was likely
to suffer inhuman or degrading treatment or punishment
involved a breach of article 3 of the Convention by the
extraditing State.265 Alternatively, a State may be required
by its own international obligations to prevent certain conduct
by another State, or at least to prevent the harm that
would flow from such conduct. Thus, the basis of responsibility
in the Corfu Channel case266 was Albania’s failure
to warn the United Kingdom of the presence of mines
in Albanian waters which had been laid by a third State.
Albania’s responsibility in the circumstances was original
and not derived from the wrongfulness of the conduct of
any other State.
(5)  In most cases of collaborative conduct by States,
responsibility for the wrongful act will be determined
according to the principle of independent responsibility
referred to in paragraph (1) above. But there may be cases
where conduct of the organ of one State, not acting as an
organ or agent of another State, is nonetheless chargeable
to the latter State, and this may be so even though the
wrongfulness of the conduct lies, or at any rate primarily
lies, in a breach of the international obligations of the
former. Chapter IV of Part One defines these exceptional
cases where it is appropriate that one State should assume
responsibility for the internationally wrongful act of an-
other.
(6)  Three situations are covered in chapter IV. Article 16
deals with cases where one State provides aid or assistance
to another State with a view to assisting in the commission
of a wrongful act by the latter. Article 17 deals
with cases where one State is responsible for the internationally
wrongful act of another State because it has exercised
powers of direction and control over the commission
of an internationally wrongful act by the latter. Article 18
deals with the extreme case where one State deliberately
coerces another into committing an act which is, or but for
264 Certain Phosphate Lands in Nauru, Preliminary Objections
(see footnote 230 above), p. 258, para. 47; see also the separate opinion
of Judge Shahabuddeen, ibid., p. 284.
265 Soering v. the United Kingdom, Eur. Court H.R., Series A,
No. 161, pp. 33–36, paras. 85–91 (1989). See also Cruz Varas and
Others v. Sweden, ibid., No. 201, p. 28, paras. 69–70 (1991); and
Vilvarajah and Others v. the United Kingdom, ibid., No. 215, p. 37,
paras. 115–116 (1991).
266 Corfu Channel, Merits (see footnote 35 above), p. 22.
	 State responsibility	 65
the coercion would be,267 an internationally wrongful act
on the part of the coerced State. In all three cases, the act
in question is still committed, voluntarily or otherwise, by
organs or agents of the acting State, and is, or but for the
coercion would be, a breach of that State’s international
obligations. The implication of the second State in that
breach arises from the special circumstance of its willing
assistance in, its direction and control over or its coercion
of the acting State. But there are important differences between
the three cases. Under article 16, the State primarily
responsible is the acting State and the assisting State has a
mere supporting role. Similarly under article 17, the acting
State commits the internationally wrongful act, albeit
under the direction and control of another State. By contrast,
in the case of coercion under article 18, the coercing
State is the prime mover in respect of the conduct and the
coerced State is merely its instrument.
(7)  A feature of this chapter is that it specifies certain
conduct as internationally wrongful. This may seem to
blur the distinction maintained in the articles between
the primary or substantive obligations of the State and its
secondary obligations of responsibility.268 It is justified
on the basis that responsibility under chapter IV is in a
sense derivative.269 In national legal systems, rules dealing,
for example, with conspiracy, complicity and inducing
breach of contract may be classified as falling within
the “general part” of the law of obligations. Moreover, the
idea of the implication of one State in the conduct of another
is analogous to problems of attribution, dealt with
in chapter II.
(8)  On the other hand, the situations covered in chapter
IV have a special character. They are exceptions to
the principle of independent responsibility and they only
cover certain cases. In formulating these exceptional cases
where one State is responsible for the internationally
wrongful acts of another, it is necessary to bear in mind
certain features of the international system. First, there is
the possibility that the same conduct may be internationally
wrongful so far as one State is concerned but not for
another State having regard to its own international obligations.
Rules of derived responsibility cannot be allowed
to undermine the principle, stated in article 34 of the 1969
Vienna Convention, that a “treaty does not create either
obligations or rights for a third State without its consent”;
similar issues arise with respect to unilateral obligations
and even, in certain cases, rules of general international
law. Hence it is only in the extreme case of coercion that a
State may become responsible under this chapter for conduct
which would not have been internationally wrongful
if performed by that State. Secondly, States engage in a
wide variety of activities through a multiplicity of organs
and agencies. For example, a State providing financial or
other aid to another State should not be required to assume
the risk that the latter will divert the aid for purposes
which may be internationally unlawful. Thus, it is
267 If a State has been coerced, the wrongfulness of its act may be
precluded by force majeure: see article 23 and commentary.
268 See paras. (1)–(2) and (4) of the general commentary for an
explanation of the distinction.
269 Cf. the term responsabilité dérivée used by Arbitrator Huber in
British Claims in the Spanish Zone of Morocco (footnote 44 above),
p. 648.
necessary to establish a close connection between the action
of the assisting, directing or coercing State on the
one hand and that of the State committing the internationally
wrongful act on the other. Thus, the articles in this
chapter require that the former State should be aware of
the circumstances of the internationally wrongful act in
question, and establish a specific causal link between that
act and the conduct of the assisting, directing or coercing
State. This is done without prejudice to the general question
of “wrongful intent” in matters of State responsibility,
on which the articles are neutral.270
(9)  Similar considerations dictate the exclusion of certain
situations of “derived responsibility” from chapter
IV. One of these is incitement. The incitement of
wrongful conduct is generally not regarded as sufficient
to give rise to responsibility on the part of the inciting
State, if it is not accompanied by concrete support or
does not involve direction and control on the part of the
inciting State.271 However, there can be specific treaty
obligations prohibiting incitement under certain circumstances.272
Another concerns the issue which is described
in some systems of internal law as being an “accessory
after the fact”. It seems that there is no general obligation
on the part of third States to cooperate in suppressing
internationally wrongful conduct of another State which
may already have occurred. Again it is a matter for specific
treaty obligations to establish any such obligation of
suppression after the event. There are, however, two important
qualifications here. First, in some circumstances
assistance given by one State to another after the latter has
committed an internationally wrongful act may amount to
the adoption of that act by the former State. In such cases
responsibility for that act potentially arises pursuant to article
11. Secondly, special obligations of cooperation in
putting an end to an unlawful situation arise in the case of
serious breaches of obligations under peremptory norms
of general international law. By definition, in such cases
States will have agreed that no derogation from such obligations
is to be permitted and, faced with a serious breach
of such an obligation, certain obligations of cooperation
arise. These are dealt with in article 41.
Article 16.  Aid or assistance in the commission
of an internationally wrongful act
A State which aids or assists another State in the
commission of an internationally wrongful act by the
latter is internationally responsible for doing so if:
(a)  that State does so with knowledge of the circumstances
of the internationally wrongful act; and
(b)  the act would be internationally wrongful if
committed by that State.
270 See above, the commentary to paragraphs (3) and (10) of
article 2.
271 See the statement of the United States-French Commissioners
relating to the French Indemnity of 1831 case in Moore, History
and Digest, vol. V, p. 4447, at pp. 4473–4476. See also Military and
Paramilitary Activities in and against Nicaragua (footnote 36 above),
p. 129, para. 255, and the dissenting opinion of Judge Schwebel,
p. 389, para. 259.
272 See, e.g., article III (c) of the Convention on the Prevention and
Punishment of the Crime of Genocide; and article 4 of the International
Convention on the Elimination of All Forms of Racial Discrimination.
66	 Report of the International Law Commission on the work of its fifty-third session
Commentary
(1)  Article 16 deals with the situation where one State
provides aid or assistance to another with a view to facilitating
the commission of an internationally wrongful act
by the latter. Such situations arise where a State voluntarily
assists or aids another State in carrying out conduct
which violates the international obligations of the latter,
for example, by knowingly providing an essential facility
or financing the activity in question. Other examples include
providing means for the closing of an international
waterway, facilitating the abduction of persons on foreign
soil, or assisting in the destruction of property belonging
to nationals of a third country. The State primarily responsible
in each case is the acting State, and the assisting
State has only a supporting role. Hence the use of the
term “by the latter” in the chapeau to article 16, which
distinguishes the situation of aid or assistance from that
of co-perpetrators or co-participants in an internationally
wrongful act. Under article 16, aid or assistance by the
assisting State is not to be confused with the responsibility
of the acting State. In such a case, the assisting State
will only be responsible to the extent that its own conduct
has caused or contributed to the internationally wrongful
act. Thus, in cases where that internationally wrongful act
would clearly have occurred in any event, the responsibility
of the assisting State will not extend to compensating
for the act itself.
(2)  Various specific substantive rules exist, prohibiting
one State from providing assistance in the commission
of certain wrongful acts by other States or even requiring
third States to prevent or repress such acts.273 Such
provisions do not rely on any general principle of derived
responsibility, nor do they deny the existence of such a
principle, and it would be wrong to infer from them the
non-existence of any general rule. As to treaty provisions
such asArticle 2, paragraph 5, of the Charter of the United
Nations, again these have a specific rationale which goes
well beyond the scope and purpose of article 16.
(3)  Article 16 limits the scope of responsibility for aid
or assistance in three ways. First, the relevant State organ
or agency providing aid or assistance must be aware of the
circumstances making the conduct of the assisted State
internationally wrongful; secondly, the aid or assistance
must be given with a view to facilitating the commission
of that act, and must actually do so; and thirdly, the completed
act must be such that it would have been wrongful
had it been committed by the assisting State itself.
(4)  The requirement that the assisting State be aware
of the circumstances making the conduct of the assisted
State internationally wrongful is reflected by the phrase
“knowledge of the circumstances of the internationally
wrongful act”. A State providing material or financial assistance
or aid to another State does not normally assume
the risk that its assistance or aid may be used to carry
out an internationally wrongful act. If the assisting or aid-
273 See, e.g., the first principle of the Declaration on Principles of
International Law concerning Friendly Relations and Cooperation
among States in accordance with the Charter of the United
Nations (General Assembly resolution 2625 (XXV) of 24 October
1970, annex); and article 3 (f) of the Definition of Aggression
(General Assembly resolution 3314 (XXIX) of 14 December 1974,
annex).
ing State is unaware of the circumstances in which its aid
or assistance is intended to be used by the other State, it
bears no international responsibility.
(5)  The second requirement is that the aid or assistance
must be given with a view to facilitating the commission
of the wrongful act, and must actually do so. This limits
the application of article 16 to those cases where the aid or
assistance given is clearly linked to the subsequent wrongful
conduct.A State is not responsible for aid or assistance
under article 16 unless the relevant State organ intended,
by the aid or assistance given, to facilitate the occurrence
of the wrongful conduct and the internationally wrongful
conduct is actually committed by the aided or assisted
State. There is no requirement that the aid or assistance
should have been essential to the performance of the internationally
wrongful act; it is sufficient if it contributed
significantly to that act.
(6)  The third condition limits article 16 to aid or assistance
in the breach of obligations by which the aiding or
assisting State is itself bound. An aiding or assisting State
may not deliberately procure the breach by another State
of an obligation by which both States are bound; a State
cannot do by another what it cannot do by itself. On the
other hand, a State is not bound by obligations of another
State vis-à-vis third States. This basic principle is also embodied
in articles 34 and 35 of the 1969 Vienna Convention.
Correspondingly, a State is free to act for itself in a
way which is inconsistent with the obligations of another
State vis-à-vis third States. Any question of responsibility
in such cases will be a matter for the State to whom
assistance is provided vis-à-vis the injured State. Thus, it
is a necessary requirement for the responsibility of an assisting
State that the conduct in question, if attributable to
the assisting State, would have constituted a breach of its
own international obligations.
(7)  State practice supports assigning international responsibility
to a State which deliberately participates in
the internationally wrongful conduct of another through
the provision of aid or assistance, in circumstances where
the obligation breached is equally opposable to the assisting
State. For example, in 1984 the Islamic Republic of
Iran protested against the supply of financial and military
aid to Iraq by the United Kingdom, which allegedly
included chemical weapons used in attacks against Iranian
troops, on the ground that the assistance was facilitating
acts of aggression by Iraq.274 The Government of
the United Kingdom denied both the allegation that it had
chemical weapons and that it had supplied them to Iraq.275
In 1998, a similar allegation surfaced that the Sudan had
assisted Iraq to manufacture chemical weapons by allowing
Sudanese installations to be used by Iraqi technicians
for steps in the production of nerve gas.The allegation was
denied by Iraq’s representative to the United Nations.276
(8)  The obligation not to use force may also be breached
by an assisting State through permitting the use of its territory
by another State to carry out an armed attack against
a third State. An example is provided by a statement made
by the Government of the Federal Republic of Germany
274 The NewYork Times, 6 March 1984, p. A1.
275 Ibid., 5 March 1984, p. A3.
276 Ibid., 26 August 1998, p. A8.
	 State responsibility	 67
in response to an allegation that Germany had participated
in an armed attack by allowing United States military
aircraft to use airfields in its territory in connection with
the United States intervention in Lebanon. While denying
that the measures taken by the United States and the United
Kingdom in the Near East constituted intervention, the
Federal Republic of Germany nevertheless seems to have
accepted that the act of a State in placing its own territory
at the disposal of another State in order to facilitate the
commission of an unlawful use of force by that other State
was itself an internationally wrongful act.277 Another example
arises from the Tripoli bombing incident in April
1986. The Libyan Arab Jamahiriya charged the United
Kingdom with responsibility for the event, based on the
fact that the United Kingdom had allowed several of its air
bases to be used for the launching of United States fighter
planes to attack Libyan targets.278 The Libyan Arab Jamahiriya
asserted that the United Kingdom “would be held
partly responsible” for having “supported and contributed
in a direct way” to the raid.279 The United Kingdom
denied responsibility on the basis that the raid by the
United States was lawful as an act of self-defence
against Libyan terrorist attacks on United States targets.280
A proposed Security Council resolution concerning the
attack was vetoed, but the General Assembly issued a resolution
condemning the “military attack” as “a violation
of the Charter of the United Nations and of international
law”, and calling upon all States “to refrain from extending
any assistance or facilities for perpetrating acts of
aggression against the Libyan Arab Jamahiriya”.281
(9)  The obligation not to provide aid or assistance to
facilitate the commission of an internationally wrongful
act by another State is not limited to the prohibition on the
use of force. For instance, a State may incur responsibility
if it assists another State to circumvent sanctions imposed
by the Security Council282 or provides material aid to a
State that uses the aid to commit human rights violations.
In this respect, the General Assembly has called on Member
States in a number of cases to refrain from supplying
arms and other military assistance to countries found to
be committing serious human rights violations.283 Where
the allegation is that the assistance of a State has facilitated
human rights abuses by another State, the particular
circumstances of each case must be carefully examined to
determine whether the aiding State by its aid was aware of
and intended to facilitate the commission of the internationally
wrongful conduct.
277 For the text of the note from the Federal Government,
see Zeitschrift für ausländisches öffentliches Recht und Völkerrecht,
vol. 20 (August 1960), pp. 663–664.
278 See United States of America, Department of State Bulletin,
No. 2111 (June 1986), p. 8.
279 See the statement of Ambassador Hamed Houdeiry, Libyan
People’s Bureau, Paris, The Times, 16 April 1986, p. 6.
280 Statement of Mrs. Margaret Thatcher, Prime Minister, House
of Commons Debates, 6th series, vol. 95, col. 737 (15 April 1986),
reprinted in BYBIL, 1986, vol. 57, pp. 637–638.
281 General Assembly resolution 41/38 of 20 November 1986,
paras. 1 and 3.
282 See, e.g., Report by President Clinton, AJIL, vol. 91, No. 4
(October 1997), p. 709.
283 Report of the Economic and Social Council, Report of the Third
Committee of the General Assembly, draft resolution XVII (A/37/745),
p. 50.
(10)  In accordance with article 16, the assisting State is
responsible for its own act in deliberately assisting another
State to breach an international obligation by which they
are both bound. It is not responsible, as such, for the act of
the assisted State. In some cases this may be a distinction
without a difference: where the assistance is a necessary
element in the wrongful act in absence of which it could
not have occurred, the injury suffered can be concurrently
attributed to the assisting and the acting State.284 In other
cases, however, the difference may be very material: the
assistance may have been only an incidental factor in the
commission of the primary act, and may have contributed
only to a minor degree, if at all, to the injury suffered.
By assisting another State to commit an internationally
wrongful act, a State should not necessarily be held to indemnify
the victim for all the consequences of the act,
but only for those which, in accordance with the principles
stated in Part Two of the articles, flow from its own
conduct.
(11)  Article 16 does not address the question of the admissibility
of judicial proceedings to establish the responsibility
of the aiding or assisting State in the absence of
or without the consent of the aided or assisted State. ICJ
has repeatedly affirmed that it cannot decide on the international
responsibility of a State if, in order to do so, “it
would have to rule, as a prerequisite, on the lawfulness”285
of the conduct of another State, in the latter’s absence and
without its consent. This is the so-called Monetary Gold
principle.286 That principle may well apply to cases under
article 16, since it is of the essence of the responsibility
of the aiding or assisting State that the aided or assisted
State itself committed an internationally wrongful act.
The wrongfulness of the aid or assistance given by the
former is dependent, inter alia, on the wrongfulness of
the conduct of the latter. This may present practical difficulties
in some cases in establishing the responsibility
of the aiding or assisting State, but it does not vitiate the
purpose of article 16. The Monetary Gold principle is
concerned with the admissibility of claims in international
judicial proceedings, not with questions of responsibility
as such. Moreover, that principle is not all-embracing,
and the Monetary Gold principle may not be a barrier to
judicial proceedings in every case. In any event, wrongful
assistance given to another State has frequently led to
diplomatic protests. States are entitled to assert complicity
in the wrongful conduct of another State even though
no international court may have jurisdiction to rule on the
charge, at all or in the absence of the other State.
Article 17.  Direction and control exercised over the
commission of an internationally wrongful act
A State which directs and controls another State in
the commission of an internationally wrongful act by
the latter is internationally responsible for that act if:
(a)  that State does so with knowledge of the circumstances
of the internationally wrongful act; and
284 For the question of concurrent responsibility of several States for
the same injury, see article 47 and commentary.
285 East Timor (see footnote 54 above), p. 105, para. 35.
286 Monetary Gold Removed from Rome in 1943, Judgment, I.C.J.
Reports 1954, p. 19, at p. 32; Certain Phosphate Lands in Nauru,
Preliminary Objections (see footnote 230 above), p. 261, para. 55.
68	 Report of the International Law Commission on the work of its fifty-third session
(b)  the act would be internationally wrongful if
committed by that State.
Commentary
(1)  Article 17 deals with a second case of derived responsibility,
the exercise of direction and control by one
State over the commission of an internationally wrongful
act by another. Under article 16, a State providing
aid or assistance with a view to the commission of an
internationally wrongful act incurs international responsibility
only to the extent of the aid or assistance given.
By contrast, a State which directs and controls another in
the commission of an internationally wrongful act is responsible
for the act itself, since it controlled and directed
the act in its entirety.
(2)  Some examples of international responsibility flowing
from the exercise of direction and control over the
commission of a wrongful act by another State are now
largely of historical significance. International dependency
relationships such as “suzerainty” or “protectorate”
warranted treating the dominant State as internationally
responsible for conduct formally attributable to the
dependent State. For example, in Rights of Nationals of
the United States of America in Morocco,287 France commenced
proceedings under the Optional Clause in respect
of a dispute concerning the rights of United States nationals
in Morocco under French protectorate. The United
States objected that any eventual judgment might not be
considered as binding upon Morocco, which was not a
party to the proceedings. France confirmed that it was
acting both in its own name and as the protecting power
over Morocco, with the result that the Court’s judgment
would be binding both on France and on Morocco,288 and
the case proceeded on that basis.289 The Court’s judgment
concerned questions of the responsibility of France in respect
of the conduct of Morocco which were raised both
by the application and by the United States counterclaim.
(3)  With the developments in international relations
since 1945, and in particular the process of decolonization,
older dependency relationships have been terminated.
Such links do not involve any legal right to direction
or control on the part of the representing State. In cases
of representation, the represented entity remains responsible
for its own international obligations, even though
diplomatic communications may be channelled through
another State. The representing State in such cases does
not, merely because it is the channel through which communications
pass, assume any responsibility for their content.
This is not in contradiction to the British Claims in
the Spanish Zone of Morocco arbitration, which affirmed
that “the responsibility of the protecting State … proceeds
… from the fact that the protecting State alone represents
287 Rights of Nationals of the United States of America in Morocco
(see footnote 108 above), p. 176.
288 Ibid., I.C.J. Pleadings, vol. I, p. 235; and vol. II, pp. 431–433;
the United States thereupon withdrew its preliminary objection: ibid.,
p. 434.
289 See Rights of Nationals of the United States of America in
Morocco (footnote 108 above), p. 179.
the protected territory in its international relations”,290
and that the protecting State is answerable “in place of
the protected State”.291 The principal concern in the arbitration
was to ensure that, in the case of a protectorate
which put an end to direct international relations by the
protected State, international responsibility for wrongful
acts committed by the protected State was not erased to
the detriment of third States injured by the wrongful conduct.
The acceptance by the protecting State of the obligation
to answer in place of the protected State was viewed
as an appropriate means of avoiding that danger.292 The
justification for such an acceptance was not based on the
relationship of “representation” as such but on the fact
that the protecting State was in virtually total control over
the protected State. It was not merely acting as a channel
of communication.
(4)  Other relationships of dependency, such as dependent
territories, fall entirely outside the scope of article 17,
which is concerned only with the responsibility of one
State for the conduct of another State. In most relationships
of dependency between one territory and another,
the dependent territory, even if it may possess some international
personality, is not a State. Even in cases where
a component unit of a federal State enters into treaties or
other international legal relations in its own right, and not
by delegation from the federal State, the component unit
is not itself a State in international law. So far as State
responsibility is concerned, the position of federal States
is no different from that of any other State: the normal
principles specified in articles 4 to 9 of the draft articles
apply, and the federal State is internationally responsible
for the conduct of its component units even though that
conduct falls within their own local control under the federal
constitution.293
(5)  Nonetheless, instances exist or can be envisaged
where one State exercises the power to direct and control
the activities of another State, whether by treaty or as a
result of a military occupation or for some other reason.
For example, during the belligerent occupation of Italy by
Germany in the Second World War, it was generally acknowledged
that the Italian police in Rome operated under
the control of the occupying Power. Thus, the protest
by the Holy See in respect of wrongful acts committed by
Italian police who forcibly entered the Basilica of St. Paul
in Rome in February 1944 asserted the responsibility of
the German authorities.294 In such cases the occupying
State is responsible for acts of the occupied State which it
directs and controls.
(6)  Article 17 is limited to cases where a dominant State
actually directs and controls conduct which is a breach of
an international obligation of the dependent State. International
tribunals have consistently refused to infer responsibility
on the part of a dominant State merely because
290 British Claims in the Spanish Zone of Morocco (see footnote 44
above), p. 649.
291 Ibid., p. 648.
292 Ibid.
293 See, e.g., LaGrand, Provisional Measures (footnote 91 above).
294 See R. Ago, “L’occupazione bellica di Roma e il Trattato
lateranense”, Comunicazioni e Studi (Milan, Giuffrè, 1945), vol. II,
pp. 167–168.
	 State responsibility	 69
the latter may have the power to interfere in matters of
administration internal to a dependent State, if that power
is not exercised in the particular case. In the Brown case,
for example, the arbitral tribunal held that the authority of
Great Britain, as suzerain over the South African Republic
prior to the Boer War, “fell far short of what would be
required to make her responsible for the wrong inflicted
upon Brown”.295 It went on to deny that Great Britain
possessed power to interfere in matters of internal administration
and continued that there was no evidence “that
GreatBritaineverdidundertaketointerfereinthisway”.296
Accordingly, the relation of suzerainty “did not operate to
render Great Britain liable for the acts complained of”. 297
In the Heirs of the Duc de Guise case, the Franco-Italian
Conciliation Commission held that Italy was responsible
for a requisition carried out by Italy in Sicily at a time
when it was under Allied occupation. Its decision was not
based on the absence of Allied power to requisition the
property, or to stop Italy from doing so. Rather, the majority
pointed to the absence in fact of any “intermeddling
on the part of the Commander of the Occupation forces or
anyAllied authority calling for the requisition decrees”.298
The mere fact that a State may have power to exercise
direction and control over another State in some field is
not a sufficient basis for attributing to it any wrongful acts
of the latter State in that field.299
(7)  In the formulation of article 17, the term “controls”
refers to cases of domination over the commission of
wrongful conduct and not simply the exercise of oversight,
still less mere influence or concern. Similarly, the word
“directs” does not encompass mere incitement or suggestion
but rather connotes actual direction of an operative
kind. Both direction and control must be exercised over
the wrongful conduct in order for a dominant State to incur
responsibility. The choice of the expression, common
in English, “direction and control”, raised some problems
in other languages, owing in particular to the ambiguity
of the term “direction” which may imply, as is the case
in French, complete power, whereas it does not have this
implication in English.
(8)  Two further conditions attach to responsibility under
article 17. First, the dominant State is only responsible if
it has knowledge of the circumstances making the conduct
of the dependent State wrongful. Secondly, it has to be
shown that the completed act would have been wrongful
had it been committed by the directing and controlling
State itself. This condition is significant in the context
of bilateral obligations, which are not opposable to the
directing State. In cases of multilateral obligations and
295 Robert E. Brown (United States) v. Great Britain, UNRIAA,
vol. VI (Sales No. 1955.V.3), p. 120, at p. 130 (1923).
296 Ibid., p. 131.
297 Ibid.
298 Heirs of the Duc de Guise (see footnote 115 above). See also, in
another context, Drozd and Janousek v. France and Spain (footnote 135
above); see also Iribarne Pérez v. France, Eur. Court H.R., Series A,
No. 325–C, pp. 62–63, paras. 29–31 (1995).
299 It may be that the fact of the dependence of one State upon another
is relevant in terms of the burden of proof, since the mere existence
of a formal State apparatus does not exclude the possibility that control
was exercised in fact by an occupying Power. Cf. Restitution of Household
Effects Belonging to Jews Deported from Hungary (Germany),
Kammergericht of Berlin, ILR, vol. 44, p. 301, at pp. 340–342 (1965).
especially of obligations to the international community,
it is of much less significance. The essential principle is
that a State should not be able to do through another what
it could not do itself.
(9)  As to the responsibility of the directed and controlled
State, the mere fact that it was directed to carry out an
internationally wrongful act does not constitute an excuse
under chapter V of Part One. If the conduct in question
would involve a breach of its international obligations, it is
incumbent upon it to decline to comply with the direction.
The defence of “superior orders” does not exist for States
in international law. This is not to say that the wrongfulness
of the directed and controlled State’s conduct may
not be precluded under chapter V, but this will only be so
if it can show the existence of a circumstance precluding
wrongfulness, e.g. force majeure. In such a case it is to
the directing State alone that the injured State must look.
But as between States, genuine cases of force majeure or
coercion are exceptional. Conversely, it is no excuse for
the directing State to show that the directed State was a
willing or even enthusiastic participant in the internationally
wrongful conduct, if in truth the conditions laid down
in article 17 are met.
Article 18.  Coercion of another State
A State which coerces another State to commit an
act is internationally responsible for that act if:
(a)  the act would, but for the coercion, be an internationally
wrongful act of the coerced State; and
(b)  the coercing State does so with knowledge of the
circumstances of the act.
Commentary
(1)  The third case of derived responsibility dealt with
by chapter IV is that of coercion of one State by another.
Article 18 is concerned with the specific problem of coercion
deliberately exercised in order to procure the breach
of one State’s obligation to a third State. In such cases
the responsibility of the coercing State with respect to the
third State derives not from its act of coercion, but rather
from the wrongful conduct resulting from the action of
the coerced State. Responsibility for the coercion itself
is that of the coercing State vis-à-vis the coerced State,
whereas responsibility under article 18 is the responsibility
of the coercing State vis-à-vis a victim of the coerced
act, in particular a third State which is injured as a result.
(2)  Coercion for the purpose of article 18 has the same
essential character as force majeure under article 23.
Nothing less than conduct which forces the will of the
coerced State will suffice, giving it no effective choice
but to comply with the wishes of the coercing State. It
is not sufficient that compliance with the obligation is
made more difficult or onerous, or that the acting State
is assisted or directed in its conduct: such questions are
covered by the preceding articles. Moreover, the coercing
State must coerce the very act which is internationally
wrongful. It is not enough that the consequences of the
70	 Report of the International Law Commission on the work of its fifty-third session
coerced act merely make it more difficult for the coerced
State to comply with the obligation.
(3)  Though coercion for the purpose of article 18 is
narrowly defined, it is not limited to unlawful coercion.300
As a practical matter, most cases of coercion meeting the
requirements of the article will be unlawful, e.g. because
they involve a threat or use of force contrary to the Charter
of the United Nations, or because they involve intervention,
i.e. coercive interference, in the affairs of another
State. Such is also the case with countermeasures. They
may have a coercive character, but as is made clear in
article 49, their function is to induce a wrongdoing State
to comply with obligations of cessation and reparation towards
the State taking the countermeasures, not to coerce
that State to violate obligations to third States.301 However,
coercion could possibly take other forms, e.g. serious
economic pressure, provided that it is such as to deprive
the coerced State of any possibility of conforming
with the obligation breached.
(4)  The equation of coercion with force majeure means
that in most cases where article 18 is applicable, the responsibility
of the coerced State will be precluded vis-àvis
the injured third State. This is reflected in the phrase
“but for the coercion” in subparagraph (a) of article 18.
Coercion amounting to force majeure may be the reason
why the wrongfulness of an act is precluded vis-à-vis the
coerced State. Therefore, the act is not described as an
internationally wrongful act in the opening clause of the
article, as is done in articles 16 and 17, where no comparable
circumstance would preclude the wrongfulness of
the act of the assisted or controlled State. But there is no
reason why the wrongfulness of that act should be precluded
vis-à-vis the coercing State. On the contrary, if the
coercing State cannot be held responsible for the act in
question, the injured State may have no redress at all.
(5)  It is a further requirement for responsibility under
article 18 that the coercing State must be aware of the
circumstances which would, but for the coercion, have
entailed the wrongfulness of the coerced State’s conduct.
The reference to “circumstances” in subparagraph (b) is
understood as reference to the factual situation rather than
to the coercing State’s judgement of the legality of the act.
This point is clarified by the phrase “circumstances of the
act”. Hence, while ignorance of the law is no excuse, ignorance
of the facts is material in determining the responsibility
of the coercing State.
(6)  A State which sets out to procure by coercion a
breach of another State’s obligations to a third State
will be held responsible to the third State for the consequences,
regardless of whether the coercing State is also
bound by the obligation in question. Otherwise, the injured
State would potentially be deprived of any redress,
because the acting State may be able to rely on force majeure
as a circumstance precluding wrongfulness. Article
18 thus differs from articles 16 and 17 in that it does not
allow for an exemption from responsibility for the act of
300 P. Reuter, Introduction to the Law of Treaties, 2nd rev. ed.
(London, Kegan Paul International, 1995), paras. 271–274.
301 See article 49, para. 2, and commentary.
the coerced State in circumstances where the coercing
State is not itself bound by the obligation in question.
(7)  State practice lends support to the principle that a
State bears responsibility for the internationally wrongful
conduct of another State which it coerces. In the RomanoAmericana
case, the claim of the United States Government
in respect of the destruction of certain oil storage
and other facilities owned by a United States company on
the orders of the Government of Romania during the First
World War was originally addressed to the British Government.
At the time the facilities were destroyed, Romania
was at war with Germany, which was preparing to invade
the country, and the United States claimed that the Romanian
authorities had been “compelled” by Great Britain to
take the measures in question. In support of its claim, the
United States Government argued that the circumstances
of the case revealed “a situation where a strong belligerent
for a purpose primarily its own arising from its defensive
requirements at sea, compelled a weaker Ally to acquiesce
in an operation which it carried out on the territory of that
Ally”.302 The British Government denied responsibility,
asserting that its influence over the conduct of the Romanian
authorities “did not in any way go beyond the limits
of persuasion and good counsel as between governments
associated in a common cause”.303 The point of disagreement
between the Governments of the United States and
of Great Britain was not as to the responsibility of a State
for the conduct of another State which it has coerced, but
rather the existence of “compulsion” in the particular
circumstances of the case.304
Article 19.  Effect of this chapter
This chapter is without prejudice to the international
responsibility, under other provisions of these articles,
of the State which commits the act in question, or
of any other State.
Commentary
(1)  Article 19 serves three purposes. First, it preserves
the responsibility of the State which has committed the
internationally wrongful act, albeit with the aid or assistance,
under the direction and control or subject to the coercion
of another State. It recognizes that the attribution
of international responsibility to an assisting, directing or
coercing State does not preclude the responsibility of the
assisted, directed or coerced State.
(2)  Secondly, the article makes clear that the provisions
of chapter IV are without prejudice to any other basis for
establishing the responsibility of the assisting, directing
or coercing State under any rule of international law defining
particular conduct as wrongful. The phrase “under
302 Note from the United States Embassy in London, dated 16 February
1925, in Hackworth, op. cit. (footnote 142 above), p. 702.
303 Note from the British Foreign Office dated 5 July 1928, ibid.,
p. 704.
304 For a different example involving the coercion of a breach of contract
in circumstances amounting to a denial of justice, see C. L. Bouvé,
“Russia’s liability in tort for Persia’s breach of contract”, AJIL, vol. 6,
No. 2 (April 1912), p. 389.
	 State responsibility	 71
other provisions of these articles” is a reference, inter
alia, to article 23 (Force majeure), which might affect the
question of responsibility. The phrase also draws attention
to the fact that other provisions of the draft articles may
be relevant to the State committing the act in question,
and that chapter IV in no way precludes the issue of its
responsibility in that regard.
(3)  Thirdly, article 19 preserves the responsibility “of
any other State” to whom the internationally wrongful
conduct might also be attributable under other provisions
of the articles.
(4)  Thus, article 19 is intended to avoid any contrary inference
in respect of responsibility which may arise from
primary rules, precluding certain forms of assistance, or
from acts otherwise attributable to any State under chapter
II. The article covers both the implicated and the acting
State. It makes it clear that chapter IV is concerned only
with situations in which the act which lies at the origin
of the wrong is an act committed by one State and not by
the other. If both States commit the act, then that situation
would fall within the realm of co-perpetrators, dealt with
in chapter II.
Chapter V
CIRCUMSTANCES PRECLUDING
WRONGFULNESS
Commentary
(1)  Chapter V sets out six circumstances precluding the
wrongfulness of conduct that would otherwise not be in
conformity with the international obligations of the State
concerned.The existence in a given case of a circumstance
precluding wrongfulness in accordance with this chapter
provides a shield against an otherwise well-founded claim
for the breach of an international obligation. The six circumstances
are: consent (art. 20), self-defence (art. 21),
countermeasures (art. 22), force majeure (art. 23), distress
(art. 24) and necessity (art. 25). Article 26 makes it
clear that none of these circumstances can be relied on if
to do so would conflict with a peremptory norm of general
international law. Article 27 deals with certain consequences
of the invocation of one of these circumstances.
(2)  Consistent with the approach of the present articles,
the circumstances precluding wrongfulness set out
in chapter V are of general application. Unless otherwise
provided,305 they apply to any internationally wrongful
act whether it involves the breach by a State of an obligation
arising under a rule of general international law, a
treaty, a unilateral act or from any other source. They do
not annul or terminate the obligation; rather they provide
a justification or excuse for non-performance while the
circumstance in question subsists. This was emphasized
by ICJ in the Gabˇcíkovo-Nagymaros Project case. Hungary
sought to argue that the wrongfulness of its conduct in
discontinuing work on the Project in breach of its obliga-
305 For example, by a treaty to the contrary, which would constitute a
lex specialis under article 55.
tions under the Treaty on the Construction and Operation
of the Gabˇcíkovo-Nagymaros Barrage System was precluded
by necessity. In dealing with the Hungarian plea,
the Court said:
The state of necessity claimed by Hungary—supposing it to have been
established—thus could not permit of the conclusion that ... it had acted
in accordance with its obligations under the 1977 Treaty or that those
obligations had ceased to be binding upon it. It would only permit the
affirmation that, under the circumstances, Hungary would not incur
international responsibility by acting as it did.306
Thus a distinction must be drawn between the effect of
circumstances precluding wrongfulness and the termination
of the obligation itself. The circumstances in chapter
V operate as a shield rather than a sword. As Fitzmaurice
noted, where one of the circumstances precluding
wrongfulness applies, “the non-performance is not only
justified, but ‘looks towards’a resumption of performance
so soon as the factors causing and justifying the non-performance
are no longer present”.307
(3)  This distinction emerges clearly from the decisions
of international tribunals. In the “Rainbow Warrior” arbitration,
the tribunal held that both the law of treaties
and the law of State responsibility had to be applied, the
former to determine whether the treaty was still in force,
the latter to determine what the consequences were of
any breach of the treaty while it was in force, including
the question whether the wrongfulness of the conduct in
question was precluded.308 In the Gabˇcíkovo-Nagymaros
Project case, the Court noted that:
[E]ven if a state of necessity is found to exist, it is not a ground for the
termination of a treaty. It may only be invoked to exonerate from its
responsibility a State which has failed to implement a treaty. Even if
found justified, it does not terminate a Treaty; the Treaty may be ineffective
as long as the condition of necessity continues to exist; it may in
fact be dormant, but—unless the parties by mutual agreement terminate
the treaty—it continues to exist. As soon as the state of necessity ceases
to exist, the duty to comply with treaty obligations revives.309
(4)  While the same facts may amount, for example, to
force majeure under article 23 and to a supervening impossibility
of performance under article 61 of the 1969
Vienna Convention, the two are distinct. Force majeure
justifies non-performance of the obligation for so long as
the circumstance exists; supervening impossibility justifies
the termination of the treaty or its suspension in accordance
with the conditions laid down in article 61. The
former operates in respect of the particular obligation, the
latter with respect to the treaty which is the source of that
obligation. Just as the scope of application of the two doctrines
is different, so is their mode of application. Force
majeure excuses non-performance for the time being, but
a treaty is not automatically terminated by supervening
impossibility: at least one of the parties must decide to
terminate it.
(5)  The concept of circumstances precluding wrongfulness
may be traced to the work of the Preparatory
306 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 39,
para. 48.
307 Yearbook … 1959, vol. II, p. 41, document A/CN.4/120.
308 “Rainbow Warrior” (see footnote 46 above), pp. 251–252,
para. 75.
309 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 63,
para. 101; see also page 38, para. 47.
72	 Report of the International Law Commission on the work of its fifty-third session
Committee of the 1930 Hague Conference. Among its
Bases of discussion,310 it listed two “[c]ircumstances under
which States can decline their responsibility”, self-defence
and reprisals.311 It considered that the extent of a
State’s responsibility in the context of diplomatic protection
could also be affected by the “provocative attitude”
adopted by the injured person (Basis of discussion No.
19) and that a State could not be held responsible for damage
caused by its armed forces “in the suppression of an
insurrection, riot or other disturbance” (Basis of discussion
No. 21). However, these issues were not taken to any
conclusion.
(6)  The category of circumstances precluding wrongfulness
was developed by ILC in its work on international responsibility
for injuries to aliens312 and the performance
of treaties.313 In the event, the subject of excuses for the
non-performance of treaties was not included within the
scope of the 1969 Vienna Convention.314 It is a matter for
the law on State responsibility.
(7)  Circumstances precluding wrongfulness are to be
distinguished from other arguments which may have the
effect of allowing a State to avoid responsibility. They
have nothing to do with questions of the jurisdiction of
a court or tribunal over a dispute or the admissibility of a
claim. They are to be distinguished from the constituent
requirements of the obligation, i.e. those elements which
have to exist for the issue of wrongfulness to arise in the
first place and which are in principle specified by the obligation
itself. In this sense the circumstances precluding
wrongfulness operate like defences or excuses in internal
legal systems, and the circumstances identified in chap-
ter V are recognized by many legal systems, often under
the same designation.315 On the other hand, there is no
common approach to these circumstances in internal law,
and the conditions and limitations in chapter V have been
developed independently.
(8)  Just as the articles do not deal with questions of the
jurisdiction of courts or tribunals, so they do not deal with
issues of evidence or the burden of proof. In a bilateral
dispute over State responsibility, the onus of establishing
responsibility lies in principle on the claimant State.
Where conduct in conflict with an international obligation
is attributable to a State and that State seeks to avoid its
responsibility by relying on a circumstance under chapter
V, however, the position changes and the onus lies on that
State to justify or excuse its conduct. Indeed, it is often the
case that only that State is fully aware of the facts which
might excuse its non-performance.
310 Yearbook ... 1956, vol. II, pp. 219–225, document A/CN.4/96.
311 Ibid., pp. 224–225. Issues raised by the Calvo clause and the
exhaustion of local remedies were dealt with under the same heading.
312 Yearbook ... 1958, vol. II, p. 72. For the discussion of the
circumstances by Special Rapporteur García Amador, see his first report
on State responsibility, Yearbook ... 1956, vol. II, pp. 203–209,
document A/CN.4/96, and his third report on State responsibility,
Yearbook ... 1958, vol. II, pp. 50–55, document A/CN.4/111.
313 See the fourth report on the law of treaties of Special Rapporteur
Fitzmaurice (footnote 307 above), pp. 44–47, and his comments,
ibid., pp. 63–74.
314 See article 73 of the Convention.
315 See the comparative review by C. von Bar, The Common European
Law of Torts (Oxford University Press, 2000), vol. 2, pp. 499–
592.
(9)  Chapter V sets out the circumstances precluding
wrongfulness presently recognized under general international
law.316 Certain other candidates have been excluded.
For example, the exception of non-performance
(exceptio inadimpleti contractus) is best seen as a specific
feature of certain mutual or synallagmatic obligations and
not a circumstance precluding wrongfulness.317 The principle
that a State may not benefit from its own wrongful
act is capable of generating consequences in the field of
State responsibility but it is rather a general principle than
a specific circumstance precluding wrongfulness.318 The
so-called “clean hands” doctrine has been invoked principally
in the context of the admissibility of claims before
international courts and tribunals, though rarely applied.
It also does not need to be included here.319
Article 20.  Consent
Valid consent by a State to the commission of a
given act by another State precludes the wrongfulness
of that act in relation to the former State to the extent
that the act remains within the limits of that consent.
Commentary
(1)  Article 20 reflects the basic international law principle
of consent in the particular context of Part One. In accordance
with this principle, consent by a State to particular
conduct by another State precludes the wrongfulness
of that act in relation to the consenting State, provided the
consent is valid and to the extent that the conduct remains
within the limits of the consent given.
(2)  It is a daily occurrence that States consent to conduct
of other States which, without such consent, would
constitute a breach of an international obligation. Simple
examples include transit through the airspace or internal
waters of a State, the location of facilities on its territory
or the conduct of official investigations or inquiries
there. But a distinction must be drawn between consent in
relation to a particular situation or a particular course of
316 For the effect of contribution to the injury by the injured State or
other person or entity, see article 39 and commentary. This does not preclude
wrongfulness but is relevant in determining the extent and form
of reparation.
317 Cf. Diversion of Water from the Meuse, Judgment, 1937, P.C.I.J.,
Series A/B, No. 70, p. 4, especially at pp. 50 and 77. See also the
fourth report on the law of treaties of Special Rapporteur Fitzmaurice
(footnote 307 above), pp. 43–47; D. W. Greig, “Reciprocity, proportionality
and the law of treaties”, Virginia Journal of International Law,
vol. 34 (1994), p. 295; and for a comparative review, G. H. Treitel,
Remedies for Breach of Contract: A Comparative Account (Oxford,
Clarendon Press, 1988), pp. 245–317. For the relationship between the
exception of non-performance and countermeasures, see below, paragraph
(5) of commentary to Part Three, chap. II.
318 See, e.g., Factory at Chorzów, Jurisdiction (footnote 34 above),
p. 31; cf. Gabˇcíkovo-Nagymaros Project (footnote 27 above), p. 67,
para. 110.
319 See J. J. A. Salmon, “Des ‘mains propres’ comme condition
de recevabilité des réclamations internationales”, Annuaire français
de droit international, vol. 10 (1964), p. 225; A. Miaja de la Muela,
“Le rôle de la condition des mains propres de la personne lésée dans
les réclamations devant les tribunaux internationaux”, Mélanges offerts
à Juraj Andrassy (The Hague, Martinus Nijhoff, 1968), p. 189, and
the dissenting opinion of Judge Schwebel in Military and Paramilitary
Activities in and against Nicaragua (footnote 36 above), pp. 392–394.
	 State responsibility	 73
conduct, and consent in relation to the underlying obligation
itself. In the case of a bilateral treaty, the States parties
can at any time agree to terminate or suspend the treaty,
in which case obligations arising from the treaty will be
terminated or suspended accordingly.320 But quite apart
from that possibility, States have the right to dispense with
the performance of an obligation owed to them individually,
or generally to permit conduct to occur which (absent
such permission) would be unlawful so far as they are
concerned. In such cases, the primary obligation continues
to govern the relations between the two States, but it is
displaced on the particular occasion or for the purposes of
the particular conduct by reason of the consent given.
(3)  Consent to the commission of otherwise wrongful
conduct may be given by a State in advance or even at the
time it is occurring. By contrast, cases of consent given
after the conduct has occurred are a form of waiver or
acquiescence, leading to loss of the right to invoke
responsibility. This is dealt with in article 45.
(4)  In order to preclude wrongfulness, consent dispensing
with the performance of an obligation in a particular
case must be “valid”. Whether consent has been validly
given is a matter addressed by international law rules
outside the framework of State responsibility. Issues include
whether the agent or person who gave the consent
was authorized to do so on behalf of the State (and if not,
whether the lack of that authority was known or ought
to have been known to the acting State), or whether the
consent was vitiated by coercion or some other factor.321
Indeed there may be a question whether the State could
validly consent at all. The reference to a “valid consent”
in article 20 highlights the need to consider these issues
in certain cases.
(5)  Whether a particular person or entity had the authority
to grant consent in a given case is a separate question
from whether the conduct of that person or entity was attributable
to the State for the purposes of chapter II. For
example, the issue has arisen whether consent expressed
by a regional authority could legitimize the sending of
foreign troops into the territory of a State, or whether such
consent could only be given by the central Government,
and such questions are not resolved by saying that the acts
of the regional authority are attributable to the State under
article 4.322 In other cases, the “legitimacy” of the Government
which has given the consent has been questioned.
Sometimes the validity of consent has been questioned
because the consent was expressed in violation of relevant
provisions of the State’s internal law. These questions
depend on the rules of international law relating to the
320 1969 Vienna Convention, art. 54 (b).
321 See, e.g., the issue of Austrian consent to the Anschluss of
1938, dealt with by the Nuremberg Tribunal. The tribunal denied
that Austrian consent had been given; even if it had, it would have
been coerced and did not excuse the annexation. See “International
MilitaryTribunal(Nuremberg),judgmentandsentencesOctober1,1946:
judgment”, reprinted in AJIL, vol. 41, No. 1 (January 1947) p. 172, at
pp. 192–194.
322 This issue arose with respect to the dispatch of Belgian troops
to the Republic of the Congo in 1960. See Official Records of the
Security Council, Fifteenth Year, 873rd meeting, 13–14 July 1960,
particularly the statement of the representative of Belgium, paras. 186–
188 and 209.
expression of the will of the State, as well as rules of internal
law to which, in certain cases, international law re-
fers.
(6)  Who has authority to consent to a departure from
a particular rule may depend on the rule. It is one thing
to consent to a search of embassy premises, another to
the establishment of a military base on the territory of a
State. Different officials or agencies may have authority
in different contexts, in accordance with the arrangements
made by each State and general principles of actual and
ostensible authority. But in any case, certain modalities
need to be observed for consent to be considered valid.
Consent must be freely given and clearly established. It
must be actually expressed by the State rather than merely
presumed on the basis that the State would have consented
if it had been asked. Consent may be vitiated by error,
fraud, corruption or coercion. In this respect, the principles
concerning the validity of consent to treaties provide
relevant guidance.
(7)  Apart from drawing attention to prerequisites to a
valid consent, including issues of the authority to consent,
the requirement for consent to be valid serves a further
function. It points to the existence of cases in which consent
may not be validly given at all. This question is discussed
in relation to article 26 (compliance with peremptory
norms), which applies to chapter V as a whole.323
(8)  Examples of consent given by a State which has the
effect of rendering certain conduct lawful include commissions
of inquiry sitting on the territory of another
State, the exercise of jurisdiction over visiting forces,
humanitarian relief and rescue operations and the arrest
or detention of persons on foreign territory. In the Savarkar
case, the arbitral tribunal considered that the arrest
of Savarkar was not a violation of French sovereignty as
France had implicitly consented to the arrest through the
conduct of its gendarme, who aided the British authorities
in the arrest.324 In considering the application of article
20 to such cases it may be necessary to have regard to
the relevant primary rule. For example, only the head of
a diplomatic mission can consent to the receiving State’s
entering the premises of the mission.325
(9)  Article 20 is concerned with the relations between
the two States in question. In circumstances where the
consent of a number of States is required, the consent
of one State will not preclude wrongfulness in relation
to another.326 Furthermore, where consent is relied on to
323 See paragraph (6) of the commentary to article 26.
324 UNRIAA, vol. XI (Sales No. 61.V.4), p. 243, at pp. 252–255
(1911).
325 Vienna Convention on Diplomatic Relations, art. 22, para. 1.
326 Austrian consent to the proposed customs union of 1931 would
not have precluded its wrongfulness in regard of the obligation to
respect Austrian independence owed by Germany to all the parties
to the Treaty of Peace between the Allied and Associated Powers and
Germany (Treaty of Versailles). Likewise, Germany’s consent would
not have precluded the wrongfulness of the customs union in respect
of the obligation of the maintenance of its complete independence
imposed on Austria by the Treaty of Peace between the Allied and
Associated Powers and Austria (Peace Treaty of Saint-Germain-enLaye).
See Customs Régime between Germany and Austria, Advisory
Opinion, 1931, P.C.I.J., Series A/B, No. 41, p. 37, at pp. 46 and 49.
74	 Report of the International Law Commission on the work of its fifty-third session
preclude wrongfulness, it will be necessary to show that
the conduct fell within the limits of the consent. Consent
to overflight by commercial aircraft of another State
would not preclude the wrongfulness of overflight by aircraft
transporting troops and military equipment. Consent
to the stationing of foreign troops for a specific period
would not preclude the wrongfulness of the stationing of
such troops beyond that period.327 These limitations are
indicated by the words “given act” in article 20 as well as
by the phrase “within the limits of that consent”.
(10)  Article 20 envisages only the consent of States to
conduct otherwise in breach of an international obligation.
International law may also take into account the
consent of non-State entities such as corporations or private
persons. The extent to which investors can waive the
rules of diplomatic protection by agreement in advance
has long been controversial, but under the Convention
on the Settlement of Investment Disputes between States
and Nationals of other States (art. 27, para. 1), consent
by an investor to arbitration under the Convention has the
effect of suspending the right of diplomatic protection
by the investor’s national State. The rights conferred by
international human rights treaties cannot be waived by
their beneficiaries, but the individual’s free consent may
be relevant to their application.328 In these cases the particular
rule of international law itself allows for the consent
in question and deals with its effect. By contrast, article
20 states a general principle so far as enjoyment of
the rights and performance of the obligations of States are
concerned.
Article 21.  Self-defence
The wrongfulness of an act of a State is precluded
if the act constitutes a lawful measure of self-defence
taken in conformity with the Charter of the United
Nations.
Commentary
(1)  The existence of a general principle admitting selfdefence
as an exception to the prohibition against the use
of force in international relations is undisputed. Article 51
of the Charter of the United Nations preserves a State’s
“inherent right” of self-defence in the face of an armed
attack and forms part of the definition of the obligation
to refrain from the threat or use of force laid down in Article
2, paragraph 4. Thus, a State exercising its inherent
right of self-defence as referred to in Article 51 of the
Charter is not, even potentially, in breach ofArticle 2, paragraph
4.329
327 The non-observance of a condition placed on the consent will
not necessarily take conduct outside of the limits of the consent. For
example, consent to a visiting force on the territory of a State may be
subject to a requirement to pay rent for the use of facilities. While the
non-payment of the rent would no doubt be a wrongful act, it would not
transform the visiting force into an army of occupation.
328 See, e.g., International Covenant on Civil and Political Rights,
arts. 7; 8, para. 3; 14, para. 3 (g); and 23, para. 3.
329 Cf. Legality of the Threat or Use of Nuclear Weapons (footnote
54 above), p. 244, para. 38, and p. 263, para. 96, emphasizing the lawfulness
of the use of force in self-defence.
(2)  Self-defence may justify non-performance of certain
obligations other than that under Article 2, paragraph 4,
of the Charter of the United Nations, provided that such
non-performance is related to the breach of that provision.
Traditional international law dealt with these problems by
instituting a separate legal regime of war, defining the
scope of belligerent rights and suspending most treaties
in force between the belligerents on the outbreak of war.330
In the Charter period, declarations of war are exceptional
and military actions proclaimed as self-defence by one
or both parties occur between States formally at “peace”
with each other.331 The 1969 Vienna Convention leaves
such issues to one side by providing in article 73 that the
Convention does not prejudice “any question that may
arise in regard to a treaty ... from the outbreak of hostilities
between States”.
(3)  This is not to say that self-defence precludes the
wrongfulness of conduct in all cases or with respect to all
obligations. Examples relate to international humanitarian
law and human rights obligations. The Geneva Conventions
for the protection of war victims of 12 August 1949
and the Protocol Additional to the Geneva Conventions of
12 August 1949, and relating to the protection of victims
of international armed conflicts (Protocol I) apply equally
to all the parties in an international armed conflict, and
the same is true of customary international humanitarian
law.332 Human rights treaties contain derogation provisions
for times of public emergency, including actions
taken in self-defence. As to obligations under international
humanitarian law and in relation to non-derogable human
rights provisions, self-defence does not preclude the
wrongfulness of conduct.
(4)  ICJ in its advisory opinion on the Legality of the
Threat or Use of Nuclear Weapons provided some guidance
on this question. One issue before the Court was
whether a use of nuclear weapons would necessarily be a
breach of environmental obligations because of the massive
and long-term damage such weapons can cause. The
Court said:
[T]he issue is not whether the treaties relating to the protection of
the environment are or are not applicable during an armed conflict,
but rather whether the obligations stemming from these treaties were
intended to be obligations of total restraint during military conflict.
The Court does not consider that the treaties in question could have
intended to deprive a State of the exercise of its right of self-defence
under international law because of its obligations to protect the environment.
Nonetheless, States must take environmental considerations
into account when assessing what is necessary and proportionate in the
pursuit of legitimate military objectives. Respect for the environment
330 See further Lord McNair and A. D. Watts, The Legal Effects of
War, 4th ed. (Cambridge University Press, 1966).
331 In Oil Platforms, Preliminary Objection (see footnote 208 above),
it was not denied that the 1955 Treaty of Amity, Economic Relations
and Consular Rights remained in force, despite many actions by United
States naval forces against the Islamic Republic of Iran. In that case
both parties agreed that to the extent that any such actions were justified
by self-defence they would be lawful.
332 As the Court said of the rules of international humanitarian law
in the advisory opinion on the Legality of the Threat or Use of Nuclear
Weapons (see footnote 54 above), p. 257, para. 79, “they constitute
intransgressible principles of international customary law”. On the relationship
between human rights and humanitarian law in time of armed
conflict, see page 240, para. 25.
	 State responsibility	 75
is one of the elements that go to assessing whether an action is in conformity
with the principles of necessity and proportionality.333
A State acting in self-defence is “totally restrained” by an
international obligation if that obligation is expressed or
intended to apply as a definitive constraint even to States
in armed conflict.334
(5)  The essential effect of article 21 is to preclude the
wrongfulness of conduct of a State acting in self-defence
vis-à-vis an attacking State. But there may be effects visà-vis
third States in certain circumstances. In its advisory
opinion on the Legality of the Threat or Use of Nuclear
Weapons, the Court observed that:
[A]s in the case of the principles of humanitarian law applicable in
armed conflict, international law leaves no doubt that the principle of
neutrality, whatever its content, which is of a fundamental character
similar to that of the humanitarian principles and rules, is applicable
(subject to the relevant provisions of the United Nations Charter), to
all international armed conflict, whatever type of weapons might be
used.335
The law of neutrality distinguishes between conduct as
against a belligerent and conduct as against a neutral. But
neutral States are not unaffected by the existence of a state
of war. Article 21 leaves open all issues of the effect of
action in self-defence vis-à-vis third States.
(6)  Thus, article 21 reflects the generally accepted position
that self-defence precludes the wrongfulness of the
conduct taken within the limits laid down by international
law. The reference is to action “taken in conformity with
the Charter of the United Nations”. In addition, the term
“lawful” implies that the action taken respects those obligations
of total restraint applicable in international armed
conflict, as well as compliance with the requirements of
proportionality and of necessity inherent in the notion of
self-defence. Article 21 simply reflects the basic principle
for the purposes of chapter V, leaving questions of the
extent and application of self-defence to the applicable
primary rules referred to in the Charter.
Article 22.  Countermeasures in respect of
an internationally wrongful act
The wrongfulness of an act of a State not in conformity
with an international obligation towards another
State is precluded if and to the extent that the act
constitutes a countermeasure taken against the latter
State in accordance with chapter II of Part Three.
Commentary
(1)  In certain circumstances, the commission by one
State of an internationally wrongful act may justify another
State injured by that act in taking non-forcible countermeasures
in order to procure its cessation and to achieve
reparation for the injury. Article 22 deals with this situation
from the perspective of circumstances precluding
333 Ibid., p. 242, para. 30.
334 See, e.g., the Convention on the Prohibition of Military or any
Other Hostile Use of Environmental Modification Techniques.
335 I.C.J. Reports 1996 (see footnote 54 above), p. 261, para. 89.
wrongfulness. Chapter II of Part Three regulates countermeasures
in further detail.
(2)  Judicial decisions, State practice and doctrine confirm
the proposition that countermeasures meeting certain
substantive and procedural conditions may be legitimate.
In the Gabˇcíkovo-Nagymaros Project case, ICJ clearly
accepted that countermeasures might justify otherwise
unlawful conduct “taken in response to a previous international
wrongful act of another State and … directed
against that State”,336 provided certain conditions are met.
Similar recognition of the legitimacy of measures of this
kind in certain cases can be found in arbitral decisions, in
particular the “Naulilaa”,337 “Cysne”,338 and Air Service
Agreement339 awards.
(3)  In the literature concerning countermeasures, reference
is sometimes made to the application of a “sanction”,
or to a “reaction” to a prior internationally wrongful
act; historically the more usual terminology was that
of “legitimate reprisals” or, more generally, measures of
“self-protection” or “self‑help”. The term “sanctions” has
been used for measures taken in accordance with the constituent
instrument of some international organization, in
particular under Chapter VII of the Charter of the United
Nations—despite the fact that the Charter uses the term
“measures”, not “sanctions”. The term “reprisals” is now
no longer widely used in the present context, because of
its association with the law of belligerent reprisals involving
the use of force. At least since the Air Service Agreement
arbitration,340 the term “countermeasures” has been
preferred, and it has been adopted for the purposes of the
present articles.
(4)  Where countermeasures are taken in accordance
with article 22, the underlying obligation is not suspended,
still less terminated; the wrongfulness of the conduct
in question is precluded for the time being by reason of its
character as a countermeasure, but only provided that and
for so long as the necessary conditions for taking countermeasures
are satisfied. These conditions are set out
in Part Three, chapter II, to which article 22 refers. As a
response to internationally wrongful conduct of another
State, countermeasures may be justified only in relation to
that State. This is emphasized by the phrases “if and to the
extent” and “countermeasures taken against” the responsible
State. An act directed against a third State would not
fit this definition and could not be justified as a countermeasure.
On the other hand, indirect or consequential
effects of countermeasures on third parties, which do not
involve an independent breach of any obligation to those
third parties, will not take a countermeasure outside the
scope of article 22.
(5)  Countermeasures may only preclude wrongfulness
in the relations between an injured State and the State
which has committed the internationally wrongful act.
336 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 55,
para. 83.
337 Portuguese Colonies case (Naulilaa incident), UNRIAA,
vol. II (Sales No. 1949.V.1), p. 1011, at pp. 1025–1026 (1928).
338 Ibid., p. 1035, at p. 1052 (1930).
339 Air Service Agreement (see footnote 28 above).
340 Ibid., especially pp. 443–446, paras. 80–98.
76	 Report of the International Law Commission on the work of its fifty-third session
The principle is clearly expressed in the “Cysne” case,
where the tribunal stressed that:
reprisals, which constitute an act in principle contrary to the law of
nations, are defensible only insofar as they were provoked by some
other act likewise contrary to that law. Only reprisals taken against the
provoking State are permissible. Admittedly, it can happen that legitimate
reprisals taken against an offending State may affect the nationals
of an innocent State. But that would be an indirect and unintentional
consequence which, in practice, the injured State will always endeavour
to avoid or to limit as far as possible.341
Accordingly, the wrongfulness of Germany’s conduct visà-vis
Portugal was not precluded. Since it involved the use
of armed force, this decision concerned belligerent reprisals
rather than countermeasures in the sense of article 22.
But the same principle applies to countermeasures, as the
Court confirmed in the Gabˇcíkovo-Nagymaros Project
case when it stressed that the measure in question must be
“directed against” the responsible State.342
(6)  If article 22 had stood alone, it would have been necessary
to spell out other conditions for the legitimacy of
countermeasures, including in particular the requirement
of proportionality, the temporary or reversible character
of countermeasures and the status of certain fundamental
obligations which may not be subject to countermeasures.
Since these conditions are dealt with in Part Three,
chapter II, it is sufficient to make a cross reference to
them here. Article 22 covers any action which qualifies
as a countermeasure in accordance with those conditions.
One issue is whether countermeasures may be taken by
third States which are not themselves individually injured
by the internationally wrongful act in question, although
they are owed the obligation which has been breached.343
For example, in the case of an obligation owed to the international
community as a whole ICJ has affirmed that
all States have a legal interest in compliance.344 Article
54 leaves open the question whether any State may
take measures to ensure compliance with certain international
obligations in the general interest as distinct from
its own individual interest as an injured State. While article
22 does not cover measures taken in such a case to
the extent that these do not qualify as countermeasures,
neither does it exclude that possibility.
Article 23.  Force majeure
1.  The wrongfulness of an act of a State not in conformity
with an international obligation of that State
is precluded if the act is due to force majeure, that is
the occurrence of an irresistible force or of an unforeseen
event, beyond the control of the State, making it
materially impossible in the circumstances to perform
the obligation.
2.  Paragraph 1 does not apply if:
341 “Cysne” (see footnote 338 above), pp. 1056–1057.
342 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 55,
para. 83.
343 For the distinction between injured States and other States
entitled to invoke State responsibility, see articles 42 and 48 and
commentaries.
344 Barcelona Traction (see footnote 25 above), p. 32, para. 33.
(a)  the situation of force majeure is due, either alone
or in combination with other factors, to the conduct of
the State invoking it; or
(b)  the State has assumed the risk of that situation
occurring.
Commentary
(1)  Force majeure is quite often invoked as a ground
for precluding the wrongfulness of an act of a State.345 It
involves a situation where the State in question is in effect
compelled to act in a manner not in conformity with
the requirements of an international obligation incumbent
upon it. Force majeure differs from a situation of distress
(art. 24) or necessity (art. 25) because the conduct of the
State which would otherwise be internationally wrongful
is involuntary or at least involves no element of free
choice.
(2)  A situation of force majeure precluding wrongfulness
only arises where three elements are met: (a) the act
in question must be brought about by an irresistible force
or an unforeseen event; (b) which is beyond the control
of the State concerned; and (c) which makes it materially
impossible in the circumstances to perform the obligation.
The adjective “irresistible” qualifying the word
“force” emphasizes that there must be a constraint which
the State was unable to avoid or oppose by its own means.
To have been “unforeseen” the event must have been neither
foreseen nor of an easily foreseeable kind. Further the
“irresistible force” or “unforeseen event” must be causally
linked to the situation of material impossibility, as
indicated by the words “due to force majeure … making
it materially impossible”. Subject to paragraph 2, where
these elements are met, the wrongfulness of the State’s
conduct is precluded for so long as the situation of force
majeure subsists.
(3)  Material impossibility of performance giving rise to
force majeure may be due to a natural or physical event
(e.g. stress of weather which may divert State aircraft
into the territory of another State, earthquakes, floods or
drought) or to human intervention (e.g. loss of control over
a portion of the State’s territory as a result of an insurrection
or devastation of an area by military operations carried
out by a third State), or some combination of the two.
Certain situations of duress or coercion involving force
imposed on the State may also amount to force majeure if
they meet the various requirements of article 23. In particular,
the situation must be irresistible, so that the State
concerned has no real possibility of escaping its effects.
Force majeure does not include circumstances in which
performance of an obligation has become more difficult,
for example due to some political or economic crisis. Nor
does it cover situations brought about by the neglect or
345 “‘Force majeure’ and ‘fortuitous event’ as circumstances
precluding wrongfulness: survey of State practice, international judicial
decisions and doctrine”, study prepared by the Secretariat (Yearbook …
1978, vol. II (Part One), p. 61, document A/CN.4/315).
	 State responsibility	 77
default of the State concerned,346 even if the resulting injury
itself was accidental and unintended.347
(4)  In drafting what became article 61 of the 1969 Vienna
Convention, ILC took the view that force majeure
was a circumstance precluding wrongfulness in relation
to treaty performance, just as supervening impossibility
of performance was a ground for termination of a treaty.348
The same view was taken at the United Nations
Conference on the Law of Treaties.349 But in the interests
of the stability of treaties, the Conference insisted on a
narrow formulation of article 61 so far as treaty termination
is concerned. The degree of difficulty associated
with force majeure as a circumstance precluding wrongfulness,
though considerable, is less than is required by article
61 for termination of a treaty on grounds of supervening
impossibility, as ICJ pointed out in the GabˇcíkovoNagymaros
Project case:
Article 61, paragraph 1, requires the “permanent disappearance or destruction
of an object indispensable for the execution” of the treaty to
justify the termination of a treaty on grounds of impossibility of performance.
During the conference, a proposal was made to extend the
scope of the article by including in it cases such as the impossibility
to make certain payments because of serious financial difficulties ...
Although it was recognized that such situations could lead to a preclusion
of the wrongfulness of non-performance by a party of its treaty
obligations, the participating States were not prepared to consider such
situations to be a ground for terminating or suspending a treaty, and
preferred to limit themselves to a narrower concept.350
(5)  In practice, many of the cases where “impossibility”
has been relied upon have not involved actual impossibility
as distinct from increased difficulty of performance
and the plea of force majeure has accordingly failed. But
cases of material impossibility have occurred, e.g. where
a State aircraft is forced, due to damage or loss of control
of the aircraft owing to weather, into the airspace of another
State without the latter’s authorization. In such cases
346 For example, in relation to occurrences such as the bombing of
La Chaux-de-Fonds by German airmen on 17 October 1915, and of
Porrentruy by a French airman on 26 April 1917, ascribed to negligence
on the part of the airmen, the belligerent undertook to punish the
offenders and make reparation for the damage suffered (study prepared
by the Secretariat, ibid., paras. 255–256).
347 For example, in 1906 an American officer on the USS
Chattanooga was mortally wounded by a bullet from a French warship
as his ship entered the Chinese harbour of Chefoo. The United States
Government obtained reparation, having maintained that:
“While the killing of Lieutenant England can only be viewed as
an accident, it cannot be regarded as belonging to the unavoidable
class whereby no responsibility is entailed. Indeed, it is not conceivable
how it could have occurred without the contributory element of
lack of proper precaution on the part of those officers of the Dupetit
Thouars who were in responsible charge of the rifle firing practice
and who failed to stop firing when the Chattanooga, in the course
of her regular passage through the public channel, came into the
line of fire.”
M. M. Whiteman, Damages in International Law (Washington,
D.C., United States Government Printing Office, 1937), vol. I, p. 221.
See also the study prepared by the Secretariat (footnote 345 above),
para. 130.
348 Yearbook … 1966, vol. II, p. 255.
349 See, e.g., the proposal of the representative of Mexico, United
Nations Conference on the Law of Treaties, First and second sessions,
Vienna, 26 March–24 May 1968 and 9 April–22 May 1969, Documents
of the Conference (United Nations publication, Sales No. E.70.V.5),
Report of the Committee of the Whole on its work at the first session of
the Conference, document A/CONF.39/14, p. 182, para. 531 (a).
350 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 63,
para. 102.
the principle that wrongfulness is precluded has been ac-
cepted.351
(6)  Apart from aerial incidents, the principle in article
23 is also recognized in relation to ships in innocent
passage by article 14, paragraph 3, of the Convention
on the Territorial Sea and the Contiguous Zone (the
United Nations Convention on the Law of the Sea, art. 18,
para. 2), as well as in article 7, paragraph 1, of the Convention
on Transit Trade of Land-locked States. In these
provisions, force majeure is incorporated as a constituent
element of the relevant primary rule; nonetheless, its
acceptance in these cases helps to confirm the existence
of a general principle of international law to similar
effect.
(7)  The principle has also been accepted by international
tribunals. Mixed claims commissions have frequently
cited the unforeseeability of attacks by rebels in denying
the responsibility of the territorial State for resulting damage
suffered by foreigners.352 In the Lighthouses arbitration,
a lighthouse owned by a French company had been
requisitioned by the Government of Greece in 1915 and
was subsequently destroyed by enemy action. The arbitral
tribunal denied the French claim for restoration of the
lighthouse on grounds of force majeure.353 In the Russian
Indemnity case, the principle was accepted but the
plea of force majeure failed because the payment of the
debt was not materially impossible.354 Force majeure was
acknowledged as a general principle of law (though again
the plea was rejected on the facts of the case) by PCIJ
in the Serbian Loans and Brazilian Loans cases.355 More
recently, in the “Rainbow Warrior” arbitration, France
relied on force majeure as a circumstance precluding the
wrongfulness of its conduct in removing the officers from
Hao and not returning them following medical treatment.
The tribunal dealt with the point briefly:
New Zealand is right in asserting that the excuse of force majeure is
not of relevance in this case because the test of its applicability is of
351 See, e.g., the cases of accidental intrusion into airspace attributable
to weather, and the cases of accidental bombing of neutral
territory attributable to navigational errors during the First World War
discussed in the study prepared by the Secretariat (footnote 345 above),
paras. 250–256. See also the exchanges of correspondence between
the States concerned in the incidents involving United States military
aircraft entering the airspace of Yugoslavia in 1946, United States of
America, Department of State Bulletin (Washington, D.C.), vol. XV,
No. 376 (15 September 1946), p. 502, reproduced in the study prepared
by the Secretariat, para. 144, and the incident provoking the application
to ICJ in 1954, I.C.J. Pleadings, Treatment in Hungary of Aircraft
and Crew of the United States of America, p. 14 (note to the Hungarian
Government of 17 March 1953). It is not always clear whether these
cases are based on distress or force majeure.
352 See, e.g., the decision of the American-British Claims Commission
in the Saint Albans Raid case, Moore, History and Digest, vol. IV,
p. 4042 (1873), and the study prepared by the Secretariat (footnote 345
above), para. 339; the decisions of the United States-Venezuela Claims
Commission in the Wipperman case, Moore, History and Digest, vol.
III, p. 3039, and the study prepared by the Secretariat, paras. 349–350;
De Brissot and others case (footnote 117 above), and the study prepared
by the Secretariat, para. 352; and the decision of the BritishMexican
Claims Commission in the Gill case, UNRIAA, vol. V (Sales
No. 1952.V.3), p. 157 (1931), and the study prepared by the Secretariat,
para. 463.
353 Lighthouses arbitration (see footnote 182 above), pp. 219–220.
354 UNRIAA, vol. XI (Sales No. 61.V.4), p. 421, at p. 443 (1912).
355 Serbian Loans, Judgment No. 14, 1929, P.C.I.J., Series A, No. 20,
pp. 39–40; Brazilian Loans, Judgment No. 15, ibid., No. 21, p. 120.
78	 Report of the International Law Commission on the work of its fifty-third session
absolute and material impossibility, and because a circumstance
rendering performance more difficult or burdensome does not constitute
a case of force majeure.356
(8)  In addition to its application in inter-State cases as
a matter of public international law, force majeure has
substantial currency in the field of international commercial
arbitration, and may qualify as a general principle of
law.357
(9)  A State may not invoke force majeure if it has caused
or induced the situation in question. In Libyan Arab Foreign
Investment Company and The Republic of Burundi,
the arbitral tribunal rejected a plea of force majeure because
“the alleged impossibility [was] not the result of an
irresistible force or an unforeseen external event beyond
the control of Burundi. In fact, the impossibility is the
result of a unilateral decision of that State ...”358 Under
the equivalent ground for termination of a treaty in article
61 of the 1969 Vienna Convention, material impossibility
cannot be invoked “if the impossibility is the result
of a breach by that party either of an obligation under the
treaty or of any other international obligation owed to any
other party to the treaty”. By analogy with this provision,
paragraph 2 (a) excludes the plea in circumstances where
force majeure is due, either alone or in combination with
other factors, to the conduct of the State invoking it. For
paragraph 2 (a) to apply it is not enough that the State
invoking force majeure has contributed to the situation
of material impossibility; the situation of force majeure
must be “due” to the conduct of the State invoking it. This
allows for force majeure to be invoked in situations in
which a State may have unwittingly contributed to the occurrence
of material impossibility by something which,
in hindsight, might have been done differently but which
was done in good faith and did not itself make the event
any less unforeseen. Paragraph 2 (a) requires that the
State’s role in the occurrence of force majeure must be
substantial.
(10)  Paragraph 2 (b) deals with situations in which the
State has already accepted the risk of the occurrence of
force majeure, whether it has done so in terms of the obligation
itself or by its conduct or by virtue of some unilateral
act. This reflects the principle that force majeure
should not excuse performance if the State has undertaken
to prevent the particular situation arising or has otherwise
assumed that risk.359 Once a State accepts the responsibil-
356 “Rainbow Warrior” (see footnote 46 above), p. 253.
357 On force majeure in the case law of the Iran-United States Claims
Tribunal, see G. H.Aldrich, The Jurisprudence of the Iran-United States
Claims Tribunal (Oxford, Clarendon Press, 1996), pp. 306–320. Force
majeure has also been recognized as a general principle of law by the
European Court of Justice: see, e.g., case 145/85, Denkavit v. Belgium,
Eur. Court H.R., Reports 1987–2, p. 565; case 101/84, Commission of
the European Communities v. Italian Republic, ibid., Reports 1985–
6, p. 2629. See also article 79 of the United Nations Convention on
Contracts for the International Sale of Goods; P. Schlechtriem, ed.,
Commentary on the UN Convention on the International Sale of Goods,
2nd ed. (trans. G. Thomas) (Oxford, Clarendon Press, 1998), pp.
600–626; and article 7.1.7 of the UNIDROIT Principles, Principles of
International Commercial Contracts (Rome, Unidroit, 1994), pp. 169–
171.
358 ILR, vol. 96 (1994), p. 318, para. 55.
359 As the study prepared by the Secretariat (footnote 345 above),
para. 31, points out, States may renounce the right to rely on force
majeure by agreement. The most common way of doing so would be by
ity for a particular risk it cannot then claim force majeure
to avoid responsibility. But the assumption of risk must
be unequivocal and directed towards those to whom the
obligation is owed.
Article 24.  Distress
1.  The wrongfulness of an act of a State not in conformity
with an international obligation of that State
is precluded if the author of the act in question has
no other reasonable way, in a situation of distress, of
saving the author’s life or the lives of other persons
entrusted to the author’s care.
2.  Paragraph 1 does not apply if:
(a)  the situation of distress is due, either alone or in
combination with other factors, to the conduct of the
State invoking it; or
(b)  the act in question is likely to create a comparable
or greater peril.
Commentary
(1)  Article 24 deals with the specific case where an individual
whose acts are attributable to the State is in a situation
of peril, either personally or in relation to persons
under his or her care. The article precludes the wrongfulness
of conduct adopted by the State agent in circumstances
where the agent had no other reasonable way of
saving life. Unlike situations of force majeure dealt with
in article 23, a person acting under distress is not acting
involuntarily, even though the choice is effectively nullified
by the situation of peril.360 Nor is it a case of choosing
between compliance with international law and other
legitimate interests of the State, such as characterize situations
of necessity under article 25. The interest concerned
is the immediate one of saving people’s lives, irrespective
of their nationality.
(2)  In practice, cases of distress have mostly involved
aircraft or ships entering State territory under stress of
weatherorfollowingmechanicalornavigationalfailure.361
An example is the entry of United States military aircraft
into Yugoslavia’s airspace in 1946. On two occasions,
United States military aircraft entered Yugoslav airspace
without authorization and were attacked by Yugoslav air
defences. The United States Government protested the
Yugoslav action on the basis that the aircraft had entered
Yugoslav airspace solely in order to escape extreme danger.
The Yugoslav Government responded by denouncing
the systematic violation of its airspace, which it claimed
could only be intentional in view of its frequency. A later
note from the Yugoslav chargé d’affaires informed the
United States Department of State that Marshal Tito had
an agreement or obligation assuming in advance the risk of the particular
force majeure event.
360 For this reason, writers who have considered this situation have
often defined it as one of “relative impossibility” of complying with
the international obligation. See, e.g., O. J. Lissitzyn, “The treatment of
aerial intruders in recent practice and international law”, AJIL, vol. 47,
No. 4 (October 1953), p. 588.
361 See the study prepared by the Secretariat (footnote 345 above),
paras. 141–142 and 252.
	 State responsibility	 79
forbidden any firing on aircraft which flew over Yugoslav
territory without authorization, presuming that, for its
part, the United States Government “would undertake the
steps necessary to prevent these flights, except in the case
of emergency or bad weather, for which arrangements
could be made by agreement between American and
Yugoslav authorities”.362 The reply of the United States
Acting Secretary of State reiterated the assertion that no
United States planes had flown overYugoslavia intentionally
without prior authorization fromYugoslav authorities
“unless forced to do so in an emergency”. However, the
Acting Secretary of State added:
I presume that the Government of Yugoslavia recognizes that in case
a plane and its occupants are jeopardized, the aircraft may change its
course so as to seek safety, even though such action may result in flying
overYugoslav territory without prior clearance.363
(3)  Claims of distress have also been made in cases of
violation of maritime boundaries. For example, in December
1975, after British naval vessels entered Icelandic
territorial waters, the British Government claimed that
the vessels in question had done so in search of “shelter
from severe weather, as they have the right to do under
customary international law”.364 Iceland maintained that
British vessels were in its waters for the sole purpose of
provoking an incident, but did not contest the point that if
the British vessels had been in a situation of distress, they
could enter Icelandic territorial waters.
(4)  Although historically practice has focused on cases
involving ships and aircraft, article 24 is not limited to such
cases.365 The “Rainbow Warrior” arbitration involved a
plea of distress as a circumstance precluding wrongfulness
outside the context of ships or aircraft. France sought
to justify its conduct in removing the two officers from
the island of Hao on the ground of “circumstances of distress
in a case of extreme urgency involving elementary
humanitarian considerations affecting the acting organs of
the State”.366 The tribunal unanimously accepted that this
plea was admissible in principle, and by majority that it
was applicable to the facts of one of the two cases. As to
the principle, the tribunal required France to show three
things:
(1)  The existence of very exceptional circumstances of extreme
urgency involving medical or other considerations of an elementary
nature, provided always that a prompt recognition of the existence of
those exceptional circumstances is subsequently obtained from the
other interested party or is clearly demonstrated.
362 United States of America, Department of State Bulletin
(see footnote 351 above), reproduced in the study prepared by the
Secretariat (see footnote 345 above), para. 144.
363 Study prepared by the Secretariat (see footnote 345 above),
para. 145. The same argument is found in the Memorial of 2 December
1958 submitted by the United States Government to ICJ in relation
to another aerial incident (I.C.J. Pleadings, Aerial Incident of 27 July
1955, pp. 358–359).
364 Official Records of the Security Council, Thirtieth Year, 1866th
meeting, 16 December 1975, para. 24; see the study prepared by the
Secretariat (footnote 345 above), para. 136.
365 There have also been cases involving the violation of a land frontier
in order to save the life of a person in danger. See, e.g., the case
of violation of the Austrian border by Italian soldiers in 1862, study
prepared by the Secretariat (footnote 345 above), para. 121.
366 “Rainbow Warrior” (see footnote 46 above), pp. 254–255,
para. 78.
(2)  The reestablishment of the original situation of compliance
with the assignment in Hao as soon as the reasons of emergency
invoked to justify the repatriation had disappeared.
(3)  The existence of a good faith effort to try to obtain the consent
of New Zealand in terms of the 1986 Agreement.367
In fact, the danger to one of the officers, though perhaps
not life-threatening, was real and might have been imminent,
and it was not denied by the New Zealand physician
who subsequently examined him. By contrast, in the case
of the second officer, the justifications given (the need
for medical examination on grounds of pregnancy and
the desire to see a dying father) did not justify emergency
action. The lives of the agent and the child were at no
stage threatened and there were excellent medical facilities
nearby. The tribunal held that:
[C]learly these circumstances entirely fail to justify France’s responsibility
for the removal of Captain Prieur and from the breach
of its obligations resulting from the failure to return the two officers
to Hao (in the case of Major Mafart once the reasons for
their removal had disappeared). There was here a clear breach of its
obligations.368
(5)  The plea of distress is also accepted in many treaties
as a circumstance justifying conduct which would
otherwise be wrongful. Article 14, paragraph 3, of the
Convention on the Territorial Sea and the Contiguous
Zone permits stopping and anchoring by ships during
their passage through foreign territorial seas insofar as
this conduct is rendered necessary by distress. This provision
is repeated in much the same terms in article 18,
paragraph 2, of the United Nations Convention on the Law
of the Sea.369 Similar provisions appear in the international
conventions on the prevention of pollution at sea.370
(6)  Article 24 is limited to cases where human life is at
stake. The tribunal in the “Rainbow Warrior” arbitration
appeared to take a broader view of the circumstances justifying
a plea of distress, apparently accepting that a serious
health risk would suffice. The problem with extending
article 24 to less than life-threatening situations is where
to place any lower limit. In situations of distress involving
aircraft there will usually be no difficulty in establishing
that there is a threat to life, but other cases present a wide
range of possibilities. Given the context of chapter V and
the likelihood that there will be other solutions available
for cases which are not apparently life-threatening, it does
367 Ibid., p. 255, para. 79.
368 Ibid., p. 263, para. 99.
369 See also articles 39, paragraph 1 (c), 98 and 109, of the Conven-
tion.
370 See, e.g., the International Convention for the Prevention of
Pollution of the Sea by Oil, article IV, paragraph 1 (a) of which
provides that the prohibition on the discharge of oil into the sea does
not apply if the discharge takes place “for the purpose of securing
the safety of the ship, preventing damage to the ship or cargo, or saving
life at sea”. See also the Convention on the Prevention of Marine
Pollution by Dumping of Wastes and Other Matter, article V, paragraph
1 of which provides that the prohibition on dumping of wastes
does not apply when it is “necessary to secure the safety of human life
or of vessels, aircraft, platforms or other man-made structures at sea
… in any case which constitutes a danger to human life or a real threat
to vessels, aircraft, platforms or other man-made structures at sea, if
dumping appears to be the only way of averting the threat”. See also the
Convention for the Prevention of Marine Pollution by Dumping from
Ships and Aircraft (art. 8, para. 1); and the International Convention for
the Prevention of Pollution from Ships, 1973 (MARPOL Convention),
annex I, regulation 11 (a).
80	 Report of the International Law Commission on the work of its fifty-third session
not seem necessary to extend the scope of distress beyond
threats to life itself. In situations in which a State agent is
in distress and has to act to save lives, there should however
be a certain degree of flexibility in the assessment of
the conditions of distress. The “no other reasonable way”
criterion in article 24 seeks to strike a balance between
the desire to provide some flexibility regarding the choices
of action by the agent in saving lives and the need to
confine the scope of the plea having regard to its exceptional
character.
(7)  Distress may only be invoked as a circumstance precluding
wrongfulness in cases where a State agent has
acted to save his or her own life or where there exists a
special relationship between the State organ or agent and
the persons in danger. It does not extend to more general
cases of emergencies, which are more a matter of necessity
than distress.
(8)  Article 24 only precludes the wrongfulness of conduct
so far as it is necessary to avoid the life-threatening
situation. Thus, it does not exempt the State or its agent
from complying with other requirements (national or international),
e.g. the requirement to notify arrival to the
relevant authorities, or to give relevant information about
the voyage, the passengers or the cargo.371
(9)  As in the case of force majeure, a situation which
has been caused or induced by the invoking State is not
one of distress. In many cases the State invoking distress
may well have contributed, even if indirectly, to the situation.
Priority should be given to necessary life-saving
measures, however, and under paragraph 2 (a), distress
is only excluded if the situation of distress is due, either
alone or in combination with other factors, to the conduct
of the State invoking it. This is the same formula as that
adopted in respect of article 23, paragraph 2 (a).372
(10)  Distress can only preclude wrongfulness where the
interests sought to be protected (e.g. the lives of passengers
or crew) clearly outweigh the other interests at stake
in the circumstances. If the conduct sought to be excused
endangers more lives than it may save or is otherwise likely
to create a greater peril it will not be covered by the plea
of distress. For instance, a military aircraft carrying explosives
might cause a disaster by making an emergency
landing, or a nuclear submarine with a serious breakdown
might cause radioactive contamination to a port in which
it sought refuge. Paragraph 2 (b) stipulates that distress
does not apply if the act in question is likely to create a
comparable or greater peril. This is consistent with paragraph
1, which in asking whether the agent had “no other
reasonable way” to save life establishes an objective test.
371 See Cashin and Lewis v. The King, Canada Law Reports (1935),
p. 103 (even if a vessel enters a port in distress, it is not exempted
from the requirement to report on its voyage). See also the “Rebecca”,
Mexico-United States General Claims Commission, AJIL, vol. 23,
No. 4 (October 1929), p. 860 (vessel entered port in distress; merchandise
seized for customs offence: held, entry reasonably necessary in the
circumstances and not a mere matter of convenience; seizure therefore
unlawful); the “May” v. The King, Canada Law Reports (1931), p.
374; the “Queen City” v. The King, ibid., p. 387; and Rex v. Flahaut,
Dominion Law Reports (1935), p. 685 (test of “real and irresistible
distress” applied).
372 See paragraph (9) of the commentary to article 23.
The words “comparable or greater peril” must be assessed
in the context of the overall purpose of saving lives.
Article 25.  Necessity
1.  Necessity may not be invoked by a State as a
ground for precluding the wrongfulness of an act not
in conformity with an international obligation of that
State unless the act:
(a)  is the only way for the State to safeguard an essential
interest against a grave and imminent peril;
and
(b)  does not seriously impair an essential interest of
the State or States towards which the obligation exists,
or of the international community as a whole.
2.  In any case, necessity may not be invoked by a
State as a ground for precluding wrongfulness if:
(a)  the international obligation in question excludes
the possibility of invoking necessity; or
(b)  the State has contributed to the situation of
necessity.
Commentary
(1)  The term “necessity” (état de nécessité) is used to
denote those exceptional cases where the only way a State
can safeguard an essential interest threatened by a grave
and imminent peril is, for the time being, not to perform
some other international obligation of lesser weight or urgency.
Under conditions narrowly defined in article 25,
such a plea is recognized as a circumstance precluding
wrongfulness.
(2)  The plea of necessity is exceptional in a number of
respects. Unlike consent (art. 20), self-defence (art. 21)
or countermeasures (art. 22), it is not dependent on the
prior conduct of the injured State. Unlike force majeure
(art. 23), it does not involve conduct which is involuntary
or coerced. Unlike distress (art. 24), necessity consists
not in danger to the lives of individuals in the charge of a
State official but in a grave danger either to the essential
interests of the State or of the international community
as a whole. It arises where there is an irreconcilable conflict
between an essential interest on the one hand and an
obligation of the State invoking necessity on the other.
These special features mean that necessity will only
rarely be available to excuse non-performance of an obligation
and that it is subject to strict limitations to safeguard
against possible abuse.373
(3)  There is substantial authority in support of the existence
of necessity as a circumstance precluding wrongful-
373 Perhaps the classic case of such an abuse was the occupation of
Luxembourg and Belgium by Germany in 1914, which Germany sought
to justify on the ground of necessity. See, in particular, the note presented
on 2 August 1914 by the German Minister in Brussels to the Belgian
Minister for Foreign Affairs, in J. B. Scott, ed., Diplomatic Documents
relating to the Outbreak of the European War (New York, Oxford University
Press, 1916), part I, pp. 749–750, and the speech in the Reichstag
by the German Chancellor von Bethmann-Hollweg, on 4 August
1914, containing the well-known words: wir sind jetzt in der Notwehr;
und Not kennt kein Gebot! (we are in a state of self-defence and necessity
knows no law), Jahrbuch des Völkerrechts, vol. III (1916), p. 728.
	 State responsibility	 81
ness. It has been invoked by States and has been dealt with
by a number of international tribunals. In these cases the
plea of necessity has been accepted in principle, or at least
not rejected.
(4)  In an Anglo-Portuguese dispute of 1832, the Portuguese
Government argued that the pressing necessity
of providing for the subsistence of certain contingents
of troops engaged in quelling internal disturbances had
justified its appropriation of property owned by British
subjects, notwithstanding a treaty stipulation. The British
Government was advised that:
the Treaties between this Country and Portugal are [not] of so stubborn
and unbending a nature, as to be incapable of modification under any
circumstances whatever, or that their stipulations ought to be so strictly
adhered to, as to deprive the Government of Portugal of the right of using
those means, which may be absolutely and indispensably necessary
to the safety, and even to the very existence of the State.
The extent of the necessity, which will justify such an appropriation of
the Property of British Subjects, must depend upon the circumstances
of the particular case, but it must be imminent and urgent.374
(5)  The “Caroline” incident of 1837, though frequently
referred to as an instance of self-defence, really involved
the plea of necessity at a time when the law concerning
the use of force had a quite different basis than it has at
present. In that case, British armed forces entered United
States territory and attacked and destroyed a vessel owned
by United States citizens which was carrying recruits
and military and other material to Canadian insurgents.
In response to the protests by the United States, the British
Minister in Washington, Fox, referred to the “necessity of
self-defence and self-preservation”; the same point was
made by counsel consulted by the British Government,
who stated that “the conduct of the British Authorities”
was justified because it was “absolutely necessary as a
measure of precaution”.375 Secretary of State Webster
replied to Minister Fox that “nothing less than a clear
and absolute necessity can afford ground of justification”
for the commission “of hostile acts within the territory
of a Power at Peace”, and observed that the British
Government must prove that the action of its forces had
really been caused by “a necessity of self-defence, instant,
overwhelming, leaving no choice of means, and no
moment for deliberation”.376 In his message to Congress
of 7 December 1841, President Tyler reiterated that:
This Government can never concede to any foreign Government the
power, except in a case of the most urgent and extreme necessity, of
invading its territory, either to arrest the persons or destroy the property
of those who may have violated the municipal laws of such foreign
Government.”377
The incident was not closed until 1842, with an exchange
of letters in which the two Governments agreed that “a
strong overpowering necessity may arise when this great
principle may and must be suspended”. “It must be so”,
374 Lord McNair, ed., International Law Opinions (Cambridge University
Press, 1956), vol. II, Peace, p. 232.
375 See respectively W. R. Manning, ed., Diplomatic Correspondence
of the United States: Canadian Relations 1784–1860 (Washington,
D.C., Carnegie Endowment for International Peace, 1943),
vol. III, p. 422; and Lord McNair, ed., International Law Opinions
(footnote 374 above), p. 221, at p. 228.
376 British and Foreign State Papers, 1840–1841 (London, Ridgway,
1857), vol. 29, p. 1129.
377 Ibid., 1841–1842, vol. 30, p. 194.
added Lord Ashburton, the British Government’s ad hoc
envoy to Washington, “for the shortest possible period
during the continuance of an admitted overruling necessity,
and strictly confined within the narrowest limits imposed
by that necessity”.378
(6)  In the Russian Fur Seals controversy of 1893, the
“essential interest” to be safeguarded against a “grave and
imminent peril” was the natural environment in an area
not subject to the jurisdiction of any State or to any international
regulation. Facing the danger of extermination of
a fur seal population by unrestricted hunting, the Russian
Government issued a decree prohibiting sealing in an area
of the high seas. In a letter to the BritishAmbassador dated
12 February (24 February) 1893, the Russian Minister for
Foreign Affairs explained that the action had been taken
because of the “absolute necessity of immediate provisional
measures” in view of the imminence of the hunting
season. He “emphasize[d] the essentially precautionary
character of the above-mentioned measures, which were
taken under the pressure of exceptional circumstances”379
and declared his willingness to conclude an agreement
with the British Government with a view to a longer-term
settlement of the question of sealing in the area.
(7)  In the Russian Indemnity case, the Government of
the Ottoman Empire, to justify its delay in paying its debt
to the Russian Government, invoked among other reasons
the fact that it had been in an extremely difficult financial
situation, which it described as “force majeure” but
which was more like a state of necessity. The arbitral tribunal
accepted the plea in principle:
The exception of force majeure, invoked in the first place, is arguable in
international public law, as well as in private law; international law must
adapt itself to political exigencies. The Imperial Russian Government
expressly admits ... that the obligation for a State to execute treaties
may be weakened “if the very existence of the State is endangered, if
observation of the international duty is ... self-destructive”.380
It considered, however, that:
It would be a manifest exaggeration to admit that the payment (or the
contracting of a loan for the payment) of the relatively small sum of
6 million francs due to the Russian claimants would have imperilled
the existence of the Ottoman Empire or seriously endangered its internal
or external situation.381
In its view, compliance with an international obligation
must be “self-destructive” for the wrongfulness of the
conduct not in conformity with the obligation to be pre-
cluded.382
378 Ibid., p. 195. See Secretary of State Webster’s reply on page 201.
379 Ibid., 1893–1894 (London, HM Stationery Office, 1899), vol. 86,
p. 220; and the study prepared by the Secretariat (see footnote 345
above), para. 155.
380 See footnote 354 above; see also the study prepared by the Secretariat
(footnote 345 above), para. 394.
381 Ibid.
382 A case in which the parties to the dispute agreed that very
serious financial difficulties could justify a different mode of
discharging the obligation other than that originally provided for arose in
connection with the enforcement of the arbitral award in Forests of
Central Rhodopia, UNRIAA, vol. III (Sales No. 1949.V.2), p. 1405
(1933); see League of Nations, Official Journal, 15th Year, No. 11
(part I) (November 1934), p. 1432.
82	 Report of the International Law Commission on the work of its fifty-third session
(8)  In Société commerciale de Belgique,383 the Greek
Government owed money to a Belgian company under
two arbitral awards. Belgium applied to PCIJ for a declaration
that the Greek Government, in refusing to carry
out the awards, was in breach of its international obligations.
The Greek Government pleaded the country’s serious
budgetary and monetary situation.384 The Court noted
that it was not within its mandate to declare whether the
Greek Government was justified in not executing the arbitral
awards. However, the Court implicitly accepted the
basic principle, on which the two parties were in agree-
ment.385
(9)  In March 1967 the Liberian oil tanker Torrey
Canyon went aground on submerged rocks off the coast of
Cornwall outside British territorial waters, spilling large
amounts of oil which threatened the English coastline.
After various remedial attempts had failed, the British
Government decided to bomb the ship to burn the remaining
oil. This operation was carried out successfully.
The British Government did not advance any legal justification
for its conduct, but stressed the existence of a
situation of extreme danger and claimed that the decision
to bomb the ship had been taken only after all other
means had failed.386 No international protest resulted.
A convention was subsequently concluded to cover future
cases where intervention might prove necessary to avert
serious oil pollution.387
(10)  In the “Rainbow Warrior” arbitration, the arbitral
tribunal expressed doubt as to the existence of the excuse
of necessity. It noted that the Commission’s draft article
“allegedly authorizes a State to take unlawful action
invoking a state of necessity” and described the Commission’s
proposal as “controversial”.388
(11)  By contrast, in the Gabˇcíkovo-Nagymaros Project
case, ICJ carefully considered an argument based on the
Commission’s draft article (now article 25), expressly
accepting the principle while at the same time rejecting
its invocation in the circumstances of that case. As to the
383 Société commerciale de Belgique, Judgment, 1939, P.C.I.J.,
Series A/B, No. 78, p. 160.
384 P.C.I.J., Series C, No. 87, pp. 141 and 190; study prepared by the
Secretariat (footnote 345 above), para. 278. See generally paragraphs
276–287 for the Greek arguments relative to the state of necessity.
385 See footnote 383 above; and the study prepared by the Sec-retariat
(footnote 345 above), para. 288. See also the Serbian Loans case,
where the positions of the parties and the Court on the point were very
similar (footnote 355 above); the French Company of Venezuelan
Railroads case (footnote 178 above) p. 353; and the study prepared
by the Secretariat (footnote 345 above), paras. 263–268 and 385–386.
In his separate opinion in the Oscar Chinn case, Judge Anzilotti
accepted the principle that “necessity may excuse the non-observance
of international obligations”, but denied its applicability on the facts
(Judgment, 1934, P.C.I.J., Series A/B, No. 63, p. 65, at pp. 112–114).
386 The “Torrey Canyon”, Cmnd. 3246 (London, HM Stationery Office,
1967).
387 International Convention relating to Intervention on the High
Seas in Cases of Oil Pollution Casualties.
388 “Rainbow Warrior” (see footnote 46 above), p. 254. In Libyan
Arab Foreign Investment Company and The Republic of Burundi
(see footnote 358 above), p. 319, the tribunal declined to comment
on the appropriateness of codifying the doctrine of necessity, noting
that the measures taken by Burundi did not appear to have been the
only means of safeguarding an essential interest “against a grave and
imminent peril”.
principle itself, the Court noted that the parties had both
relied on the Commission’s draft article as an appropriate
formulation, and continued:
The Court considers ... that the state of necessity is a ground recognized
by customary international law for precluding the wrongfulness
of an act not in conformity with an international obligation. It observes
moreover that such ground for precluding wrongfulness can only be accepted
on an exceptional basis. The International Law Commission was
of the same opinion when it explained that it had opted for a negative
form of words ...
Thus, according to the Commission, the state of necessity can only be
invoked under certain strictly defined conditions which must be cumulatively
satisfied; and the State concerned is not the sole judge of
whether those conditions have been met.
... In the present case, the following basic conditions ... are relevant: it
must have been occasioned by an “essential interest” of the State which
is the author of the act conflicting with one of its international obligations;
that interest must have been threatened by a “grave and imminent
peril”; the act being challenged must have been the “only means” of
safeguarding that interest; that act must not have “seriously impair[ed]
an essential interest” of the State towards which the obligation existed;
and the State which is the author of that act must not have “contributed
to the occurrence of the state of necessity”. Those conditions reflect
customary international law. 389
(12)  The plea of necessity was apparently an issue in
the Fisheries Jurisdiction case.390 Regulatory measures
taken to conserve straddling stocks had been taken by the
Northwest Atlantic Fisheries Organization (NAFO) but
had, in Canada’s opinion, proved ineffective for various
reasons. By the Coastal Fisheries Protection Act 1994,
Canada declared that the straddling stocks of the Grand
Banks were “threatened with extinction”, and asserted
that the purpose of the Act and regulations was “to enable
Canada to take urgent action necessary to prevent further
destruction of those stocks and to permit their rebuilding”.
Canadian officials subsequently boarded and seized
a Spanish fishing ship, the Estai, on the high seas, leading
to a conflict with the European Union and with Spain.
The Spanish Government denied that the arrest could be
justified by concerns as to conservation “since it violates
the established provisions of the NAFO Convention [Convention
on Future Multilateral Cooperation in the Northwest
Atlantic Fisheries] to which Canada is a party”.391
Canada disagreed, asserting that “the arrest of the Estai
was necessary in order to put a stop to the overfishing of
Greenland halibut by Spanish fishermen”.392 The Court
held that it had no jurisdiction over the case.393
389 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), pp. 40–
41, paras. 51–52.
390 Fisheries Jurisdiction (Spain v. Canada), Jurisdiction of the
Court, Judgment, I.C.J. Reports 1998, p. 432.
391 Ibid., p. 443, para. 20. For the European Community protest of
10 March 1995, asserting that the arrest “cannot be justified by any
means”, see Memorial of Spain (Jurisdiction of the Court), I.C.J.
Pleadings, Fisheries Jurisdiction (Spain v. Canada), p. 17, at p. 38,
para. 15.
392 Fisheries Jurisdiction (see footnote 390 above), p. 443, para. 20.
See also the Canadian Counter-Memorial (29 February 1996), I.C.J.
Pleadings (footnote 391 above), paras. 17–45.
393 By anAgreed Minute between Canada and the European Community,
Canada undertook to repeal the regulations applying the 1994 Act
to Spanish and Portuguese vessels in the NAFO area and to release the
Estai. The parties expressly maintained “their respective positions on
the conformity of the amendment of 25 May 1994 to Canada’s Coastal
Fisheries Protection Act, and subsequent regulations, with customary
international law and the NAFO Convention” and reserved “their ability
to preserve and defend their rights in conformity with international
law”. See Canada-European Community: Agreed Minute on the Con-
	 State responsibility	 83
(13)  The existence and limits of a plea of necessity have
given rise to a long-standing controversy among writers.
It was for the most part explicitly accepted by the early
writers, subject to strict conditions.394 In the nineteenth
century, abuses of necessity associated with the idea of
“fundamental rights of States” led to a reaction against
the doctrine. During the twentieth century, the number of
writers opposed to the concept of state of necessity in international
law increased, but the balance of doctrine has
continued to favour the existence of the plea.395
(14)  On balance, State practice and judicial decisions
support the view that necessity may constitute a circumstance
precluding wrongfulness under certain very limited
conditions, and this view is embodied in article 25. The
cases show that necessity has been invoked to preclude
the wrongfulness of acts contrary to a broad range of obligations,
whether customary or conventional in origin.396
It has been invoked to protect a wide variety of interests,
including safeguarding the environment, preserving the
very existence of the State and its people in time of public
emergency, or ensuring the safety of a civilian population.
But stringent conditions are imposed before any
such plea is allowed. This is reflected in article 25. In particular,
to emphasize the exceptional nature of necessity
and concerns about its possible abuse, article 25 is cast
in negative language (“Necessity may not be invoked …
unless”).397 In this respect it mirrors the language of article
62 of the 1969 Vienna Convention dealing with fundamental
change of circumstances. It also mirrors that
language in establishing, in paragraph 1, two conditions
without which necessity may not be invoked and excluding,
in paragraph 2, two situations entirely from the scope
of the excuse of necessity.398
servation and Management of Fish Stocks (Brussels, 20 April 1995),
ILM, vol. 34, No. 5 (September 1995), p. 1260. See also the Agreement
for the Implementation of the Provisions of the United Nations
Convention on the Law of the Sea of 10 December 1982 relating to the
Conservation and Management of Straddling Fish Stocks and Highly
Migratory Fish Stocks.
394 See B. Ayala, De jure et officiis bellicis et disciplina militari,
libri tres (1582) (Washington, D.C., Carnegie Institution, 1912), vol.
II, p. 135; A. Gentili, De iure belli, libri tres (1612) (Oxford, Clarendon
Press, 1933), vol. II, p. 351; H. Grotius, De jure belli ac pacis, libri
tres (1646) (Oxford, Clarendon Press, 1925), vol. II, pp. 193 et seq.;
S. Pufendorf, De jure naturae et gentium, libri octo (1688) (Oxford,
Clarendon Press, 1934), vol. II, pp. 295–296; C. Wolff, Jus gentium
methodo scientifica pertractatum (1764) (Oxford, Clarendon Press,
1934), pp. 173–174; and E. de Vattel, The Law of Nations or the Principles
of Natural Law (1758) (Washington, D.C., Carnegie Institution,
1916), vol. III, p. 149.
395 For a review of the earlier doctrine, see Yearbook … 1980, vol.
II (Part Two), pp. 47–49; see also P. A. Pillitu, Lo stato di necessità
nel diritto internazionale (University of Perugia/Editrice Licosa, 1981);
J. Barboza, “Necessity (revisited) in international law”, Essays in International
Law in Honour of Judge Manfred Lachs, J. Makarczyk, ed.
(The Hague, Martinus Nijhoff, 1984), p. 27; and R. Boed, “State of
necessity as a justification for internationally wrongful conduct”, Yale
Human Rights and Development Law Journal, vol. 3 (2000), p. 1.
396 Generally on the irrelevance of the source of the obligation
breached, see article 12 and commentary.
397 This negative formulation was referred to by ICJ in the GabˇcíkovoNagymaros
Project case (see footnote 27 above), p. 40, para. 51.
398 A further exclusion, common to all the circumstances precluding
wrongfulness, concerns peremptory norms (see article 26 and commen-
tary).
(15)  The first condition, set out in paragraph 1 (a), is
that necessity may only be invoked to safeguard an essential
interest from a grave and imminent peril. The extent
to which a given interest is “essential” depends on all the
circumstances, and cannot be prejudged. It extends to particular
interests of the State and its people, as well as of
the international community as a whole. Whatever the interest
may be, however, it is only when it is threatened by
a grave and imminent peril that this condition is satisfied.
The peril has to be objectively established and not merely
apprehended as possible. In addition to being grave, the
peril has to be imminent in the sense of proximate. However,
as the Court in the Gabˇcíkovo-Nagymaros Project
case said:
That does not exclude ... that a “peril” appearing in the long term might
be held to be “imminent” as soon as it is established, at the relevant
point in time, that the realization of that peril, however far off it might
be, is not thereby any less certain and inevitable.399
Moreover, the course of action taken must be the “only
way” available to safeguard that interest. The plea is
excluded if there are other (otherwise lawful) means available,
even if they may be more costly or less convenient.
Thus, in the Gabˇcíkovo-Nagymaros Project case, the
Court was not convinced that the unilateral suspension
and abandonment of the Project was the only course open
in the circumstances, having regard in particular to the
amount of work already done and the money expended
on it, and the possibility of remedying any problems by
other means.400 The word “way” in paragraph 1 (a) is not
limited to unilateral action but may also comprise other
forms of conduct available through cooperative action
with other States or through international organizations
(for example, conservation measures for a fishery taken
through the competent regional fisheries agency). Moreover,
the requirement of necessity is inherent in the plea:
any conduct going beyond what is strictly necessary for
the purpose will not be covered.
(16)  It is not sufficient for the purposes of paragraph 1
(a) that the peril is merely apprehended or contingent. It
is true that in questions relating, for example, to conservation
and the environment or to the safety of large structures,
there will often be issues of scientific uncertainty
and different views may be taken by informed experts on
whether there is a peril, how grave or imminent it is and
whether the means proposed are the only ones available
in the circumstances. By definition, in cases of necessity
the peril will not yet have occurred. In the GabˇcíkovoNagymaros
Project case the Court noted that the invoking
State could not be the sole judge of the necessity,401 but a
measure of uncertainty about the future does not necessarily
disqualify a State from invoking necessity, if the peril
is clearly established on the basis of the evidence reasonably
available at the time.
(17)  The second condition for invoking necessity, set out
in paragraph 1 (b), is that the conduct in question must
not seriously impair an essential interest of the other State
or States concerned, or of the international community as
399 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 42,
para. 54.
400 Ibid., pp. 42–43, para. 55.
401 Ibid., p. 40, para. 51.
84	 Report of the International Law Commission on the work of its fifty-third session
a whole (see paragraph (18) below). In other words, the
interest relied on must outweigh all other considerations,
not merely from the point of view of the acting State but
on a reasonable assessment of the competing interests,
whether these are individual or collective.402
(18)  As a matter of terminology, it is sufficient to use the
phrase “international community as a whole” rather than
“international community of States as a whole”, which
is used in the specific context of article 53 of the 1969
Vienna Convention. The insertion of the words “of States”
in article 53 of the Convention was intended to stress the
paramountcy that States have over the making of international
law, including especially the establishment of
norms of a peremptory character. On the other hand, ICJ
used the phrase “international community as a whole” in
the Barcelona Traction case,403 and it is frequently used
in treaties and other international instruments in the same
sense as in paragraph 1(b).404
(19)  Over and above the conditions in paragraph 1,
paragraph 2 lays down two general limits to any invocation
of necessity. This is made clear by the use of the
words “in any case”. Paragraph 2 (a) concerns cases
where the international obligation in question explicitly
or implicitly excludes reliance on necessity. Thus, certain
humanitarian conventions applicable to armed conflict
expressly exclude reliance on military necessity. Others
while not explicitly excluding necessity are intended to
apply in abnormal situations of peril for the responsible
State and plainly engage its essential interests. In such a
case the non-availability of the plea of necessity emerges
clearly from the object and the purpose of the rule.
(20)  According to paragraph 2 (b), necessity may not
be relied on if the responsible State has contributed to the
situation of necessity. Thus, in the Gabˇcíkovo-Nagymaros
Project case, ICJ considered that because Hungary had
“helped, by act or omission to bring about” the situation
of alleged necessity, it could not then rely on that situation
as a circumstance precluding wrongfulness.405 For a
plea of necessity to be precluded under paragraph 2 (b),
the contribution to the situation of necessity must be sufficiently
substantial and not merely incidental or peripheral.
Paragraph 2 (b) is phrased in more categorical terms
than articles 23, paragraph 2 (a), and 24, paragraph 2 (a),
because necessity needs to be more narrowly confined.
402 In the Gabˇcíkovo-Nagymaros Project case ICJ affirmed the
need to take into account any countervailing interest of the other State
concerned (see footnote 27 above), p. 46, para. 58.
403 Barcelona Traction (see footnote 25 above), p. 32, para. 33.
404 See, e.g., third preambular paragraph of the Convention on the
Prevention and Punishment of Crimes against Internationally Protected
Persons, including Diplomatic Agents; fourth preambular paragraph
of the International Convention Against the Taking of Hostages; fifth
preambular paragraph of the Convention for the Suppression of Unlawful
Acts against the Safety of Maritime Navigation; third preambular
paragraph of the Convention on the Safety of United Nations and
Associated Personnel; tenth preambular paragraph of the International
Convention for the Suppression of Terrorist Bombings; ninth preambular
paragraph of the Rome Statute of the International Criminal Court;
and ninth preambular paragraph of the International Convention for the
Suppression of the Financing of Terrorism.
405 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 46,
para. 57.
(21)  As embodied in article 25, the plea of necessity is
not intended to cover conduct which is in principle regulated
by the primary obligations. This has a particular importance
in relation to the rules relating to the use of force
in international relations and to the question of “military
necessity”. It is true that in a few cases, the plea of necessity
has been invoked to excuse military action abroad, in
particular in the context of claims to humanitarian intervention.406
The question whether measures of forcible humanitarian
intervention, not sanctioned pursuant to Chapters
VII or VIII of the Charter of the United Nations, may
be lawful under modern international law is not covered
by article 25.407 The same thing is true of the doctrine of
“military necessity” which is, in the first place, the underlying
criterion for a series of substantive rules of the law
of war and neutrality, as well as being included in terms in
a number of treaty provisions in the field of international
humanitarian law.408 In both respects, while considerations
akin to those underlying article 25 may have a role,
they are taken into account in the context of the formulation
and interpretation of the primary obligations.409
Article 26.  Compliance with peremptory norms
Nothing in this chapter precludes the wrongfulness
of any act of a State which is not in conformity with an
obligation arising under a peremptory norm of general
international law.
Commentary
(1)  In accordance with article 53 of the 1969 Vienna
Convention, a treaty which conflicts with a peremptory
norm of general international law is void. Under article
64, an earlier treaty which conflicts with a new peremp-
406 For example, in 1960 Belgium invoked necessity to justify its
military intervention in the Congo. The matter was discussed in the
Security Council but not in terms of the plea of necessity as such.
See Official Records of the Security Council, Fifteenth Year, 873rd
meeting, 13–14 July 1960, paras. 144, 182 and 192; 877th meeting,
20–21 July 1960, paras. 31 et seq. and para. 142; 878th meeting,
21 July 1960, paras. 23 and 65; and 879th meeting, 21–22 July 1960,
paras. 80 et seq. and paras. 118 and 151. For the “Caroline” incident,
see above, paragraph (5).
407 See also article 26 and commentary for the general exclusion
of the scope of circumstances precluding wrongfulness of conduct in
breach of a peremptory norm.
408 See, e.g., article 23 (g) of the Regulations respecting the Laws
and Customs of War on Land (annexed to the Hague Conventions II of
1899 and IV of 1907), which prohibits the destruction of enemy property
“unless such destruction or seizure be imperatively demanded by the
necessities of war”. Similarly, article 54, paragraph 5, of the Protocol
Additional to the Geneva Conventions of 12 August 1949, and relating
to the protection of victims of international armed conflicts (Protocol I),
appears to permit attacks on objects indispensable to the survival of the
civilian population if “imperative military necessity” so requires.
409 See, e.g., M. Huber, “Die Kriegsrechtlichen Verträge und die
Kriegsraison”, Zeitschrift für Völkerrecht, vol. VII (1913), p. 351;
D. Anzilotti, Corso di diritto internazionale (Rome, Athenaeum, 1915),
vol. III, p. 207; C. De Visscher, “Les lois de la guerre et la théorie de
la nécessité”, RGDIP, vol. 24 (1917), p. 74; N. C. H. Dunbar, “Military
necessity in war crimes trials”, BYBIL, 1952, vol. 29, p. 442; C. Greenwood,
“Historical development and legal basis”, The Handbook of
Humanitarian Law in Armed Conflicts, D. Fleck, ed. (Oxford University
Press, 1995), p. 1, at pp. 30–33; andY. Dinstein, “Military necessity”,
Encyclopedia of Public International Law, R. Bernhardt, ed. (Amsterdam,
Elsevier, 1997), vol. 3, pp. 395–397.
	 State responsibility	 85
tory norm becomes void and terminates.410 The question
is what implications these provisions may have for the
matters dealt with in chapter V.
(2)  Sir Gerald Fitzmaurice as Special Rapporteur on the
Law of Treaties treated this question on the basis of an
implied condition of “continued compatibility with international
law”, noting that:
A treaty obligation the observance of which is incompatible a new
rule or prohibition of international law in the nature of jus cogens will
justify (and require) non-observance of any treaty obligation involving
such incompatibility …
The same principle is applicable where circumstances arise subsequent
to the conclusion of a treaty, bringing into play an existing rule of international
law which was not relevant to the situation as it existed at the
time of the conclusion of the treaty.411
The Commission did not, however, propose with any specific
articles on this question, apart from articles 53 and
64 themselves.
(3)  Where there is an apparent conflict between primary
obligations, one of which arises for a State directly under
a peremptory norm of general international law, it is
evident that such an obligation must prevail. The processes
of interpretation and application should resolve such
questions without any need to resort to the secondary
rules of State responsibility. In theory, one might envisage
a conflict arising on a subsequent occasion between a
treaty obligation, apparently lawful on its face and innocent
in its purpose, and a peremptory norm. If such a case
were to arise it would be too much to invalidate the treaty
as a whole merely because its application in the given case
was not foreseen. But in practice such situations seem not
to have occurred.412 Even if they were to arise, peremptory
norms of general international law generate strong
interpretative principles which will resolve all or most
apparent conflicts.
(4)  It is, however, desirable to make it clear that the
circumstances precluding wrongfulness in chapter V of
Part One do not authorize or excuse any derogation from
a peremptory norm of general international law. For example,
a State taking countermeasures may not derogate
from such a norm: for example, a genocide cannot justify
a counter-genocide.413 The plea of necessity likewise cannot
excuse the breach of a peremptory norm. It would be
possible to incorporate this principle expressly in each of
the articles of chapter V, but it is both more economical
and more in keeping with the overriding character of this
410 See also article 44, paragraph 5, which provides that in cases
falling under article 53, no separation of the provisions of the treaty is
permitted.
411 Fourth report on the law of treaties, Yearbook … 1959 (see
footnote 307 above), p. 46. See also S. Rosenne, Breach of Treaty
(Cambridge, Grotius, 1985), p. 63.
412 For a possible analogy, see the remarks of Judge ad hoc
Lauterpacht in Application of the Convention on the Prevention and
Punishment of the Crime of Genocide, Provisional Measures, Order of
13 September 1993, I.C.J. Reports 1993, p. 325, at pp. 439–441. ICJ did
not address these issues in its order.
413 As ICJ noted in its decision in the case concerning the Application
of the Convention on the Prevention and Punishment of the Crime
of Genocide, “in no case could one breach of the Convention serve as
an excuse for another” (Counter-Claims, Order of 17 December 1997,
I.C.J. Reports 1997, p. 243, at p. 258, para. 35).
class of norms to deal with the basic principle separately.
Hence, article 26 provides that nothing in chapter V can
preclude the wrongfulness of any act of a State which is
not in conformity with an obligation arising under a peremptory
norm of general international law.414
(5)  The criteria for identifying peremptory norms of
general international law are stringent. Article 53 of the
1969Vienna Convention requires not merely that the norm
in question should meet all the criteria for recognition as
a norm of general international law, binding as such, but
further that it should be recognized as having a peremptory
character by the international community of States
as a whole. So far, relatively few peremptory norms have
been recognized as such. But various tribunals, national
and international, have affirmed the idea of peremptory
norms in contexts not limited to the validity of treaties.415
Those peremptory norms that are clearly accepted and
recognized include the prohibitions of aggression, genocide,
slavery, racial discrimination, crimes against humanity
and torture, and the right to self-determination.416
(6)  In accordance with article 26, circumstances precluding
wrongfulness cannot justify or excuse a breach
of a State’s obligations under a peremptory rule of general
international law. Article 26 does not address the prior issue
whether there has been such a breach in any given
case. This has particular relevance to certain articles in
chapter V. One State cannot dispense another from the
obligation to comply with a peremptory norm, e.g. in relation
to genocide or torture, whether by treaty or otherwise.417
But in applying some peremptory norms the consent
of a particular State may be relevant. For example, a
State may validly consent to a foreign military presence
on its territory for a lawful purpose. Determining in which
circumstances consent has been validly given is again a
matter for other rules of international law and not for the
secondary rules of State responsibility.418
Article 27.  Consequences of invoking a circumstance
precluding wrongfulness
The invocation of a circumstance precluding wrongfulness
in accordance with this chapter is without prejudice
to:
(a)  compliance with the obligation in question, if
and to the extent that the circumstance precluding
wrongfulness no longer exists;
(b)  the question of compensation for any material
loss caused by the act in question.
414 For convenience, this limitation is spelled out again in the context
of countermeasures in Part Three, chapter II. See article 50 and commentary,
paras. (9) and (10).
415 See, e.g., the decisions of the InternationalTribunal for the Former
Yugoslavia in case IT-95-17/1-T, Prosecutor v. Furundzija, judgement
of 10 December 1998; ILM, vol. 38, No. 2 (March 1999), p. 317, and
of the British House of Lords in Regina v. Bow Street Metropolitan
Stipendiary Magistrate and Others, ex parte Pinochet Ugarte (No. 3),
ILR, vol. 119. Cf. Legality of the Threat or Use of Nuclear Weapons
(footnote 54 above), p. 257, para. 79.
416 Cf. East Timor (footnote 54 above).
417 See paragraph (4) of the commentary to article 45.
418 See paragraphs (4) to (7) of the commentary to article 20.
86	 Report of the International Law Commission on the work of its fifty-third session
Commentary
(1)  Article 27 is a without prejudice clause dealing
with certain incidents or consequences of invoking circumstances
precluding wrongfulness under chapter V.
It deals with two issues. First, it makes it clear that circumstances
precluding wrongfulness do not as such affect
the underlying obligation, so that if the circumstance no
longer exists the obligation regains full force and effect.
Secondly, it refers to the possibility of compensation in
certain cases. Article 27 is framed as a without prejudice
clause because, as to the first point, it may be that the
effect of the facts which disclose a circumstance precluding
wrongfulness may also give rise to the termination of
the obligation and, as to the second point, because it is not
possible to specify in general terms when compensation
is payable.
(2)  Subparagraph (a) of article 27 addresses the question
of what happens when a condition preventing compliance
with an obligation no longer exists or gradually
ceases to operate. It makes it clear that chapter V has a
merely preclusive effect. When and to the extent that a circumstance
precluding wrongfulness ceases, or ceases to
have its preclusive effect for any reason, the obligation in
question (assuming it is still in force) will again have to be
complied with, and the State whose earlier non-compliance
was excused must act accordingly. The words “and
to the extent” are intended to cover situations in which the
conditions preventing compliance gradually lessen and
allow for partial performance of the obligation.
(3)  This principle was affirmed by the tribunal in the
“Rainbow Warrior” arbitration,419 and even more clearly
by ICJ in the Gabˇcíkovo-Nagymaros Project case. In
considering Hungary’s argument that the wrongfulness
of its conduct in discontinuing work on the Project was
precluded by a state of necessity, the Court remarked that
“[a]s soon as the state of necessity ceases to exist, the duty
to comply with treaty obligations revives”.420 It may be
that the particular circumstances precluding wrongfulness
are, at the same time, a sufficient basis for terminating the
underlying obligation. Thus, a breach of a treaty justifying
countermeasures may be “material” in terms of article 60
of the 1969 Vienna Convention and permit termination of
the treaty by the injured State. Conversely, the obligation
may be fully reinstated or its operation fully restored in
principle, but modalities for resuming performance may
need to be settled. These are not matters which article 27
can resolve, other than by providing that the invocation of
circumstances precluding wrongfulness is without prejudice
to “compliance with the obligation in question, if and
to the extent that the circumstance precluding wrongfulness
no longer exists”. Here “compliance with the obligation
in question” includes cessation of the wrongful
conduct.
(4)  Subparagraph (b) of article 27 is a reservation as to
questions of possible compensation for damage in cases
covered by chapter V. Although the article uses the term
419 “Rainbow Warrior” (see footnote 46 above), pp. 251–252,
para. 75.
420 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 63,
para 101; see also page 38, para. 47.
“compensation”, it is not concerned with compensation
within the framework of reparation for wrongful conduct,
which is the subject of article 34. Rather, it is concerned
with the question whether a State relying on a circumstance
precluding wrongfulness should nonetheless be
expected to make good any material loss suffered by any
State directly affected. The reference to “material loss”
is narrower than the concept of damage elsewhere in the
articles: article 27 concerns only the adjustment of losses
that may occur when a party relies on a circumstance covered
by chapter V.
(5)  Subparagraph (b) is a proper condition, in certain
cases, for allowing a State to rely on a circumstance precluding
wrongfulness. Without the possibility of such
recourse, the State whose conduct would otherwise be
unlawful might seek to shift the burden of the defence of
its own interests or concerns onto an innocent third State.
This principle was accepted by Hungary in invoking the
plea of necessity in the Gabˇcíkovo-Nagymaros Project
case. As ICJ noted, “Hungary expressly acknowledged
that, in any event, such a state of necessity would not
exempt it from its duty to compensate its partner”.421
(6)  Subparagraph (b) does not attempt to specify in what
circumstances compensation should be payable. Generally,
the range of possible situations covered by chapter V
is such that to lay down a detailed regime for compensation
is not appropriate. It will be for the State invoking a
circumstance precluding wrongfulness to agree with any
affected States on the possibility and extent of compensation
payable in a given case.
Part Two
CONTENT OF THE INTERNATIONAL
RESPONSIBILITY OF A STATE
(1)  Whereas Part One of the articles defines the general
conditions necessary for State responsibility to arise, Part
Two deals with the legal consequences for the responsible
State. It is true that a State may face legal consequences
of conduct which is internationally wrongful outside the
sphere of State responsibility. For example, a material
breach of a treaty may give an injured State the right to
terminate or suspend the treaty in whole or in part.422 The
focus of Part Two, however, is on the new legal relationship
which arises upon the commission by a State of an internationally
wrongful act. This constitutes the substance
or content of the international responsibility of a State
under the articles.
(2)  Within the sphere of State responsibility, the consequences
which arise by virtue of an internationally
wrongful act of a State may be specifically provided for in
such terms as to exclude other consequences, in whole or
421 Ibid., p. 39, para. 48. A separate issue was that of accounting
for accrued costs associated with the Project (ibid., p. 81, paras. 152–
153).
422 1969 Vienna Convention, art. 60.
	 State responsibility	 87
in part.423 In the absence of any specific provision, however,
international law attributes to the responsible State
new obligations, and in particular the obligation to make
reparation for the harmful consequences flowing from
that act. The close link between the breach of an international
obligation and its immediate legal consequence
in the obligation of reparation was recognized in article
36, paragraph 2, of the PCIJ Statute, which was carried
over without change as Article 36, paragraph 2, of
the ICJ Statute. In accordance with article 36, paragraph
2, States parties to the Statute may recognize as
compulsory the Court’s jurisdiction, inter alia, in all legal
disputes concerning:
(c)  The existence of any fact which, if established, would constitute
a breach of an international obligation;
(d)  The nature or extent of the reparation to be made for the breach
of an international obligation.
Part One of the articles sets out the general legal rules
applicable to the question identified in subparagraph (c),
while Part Two does the same for subparagraph (d).
(3)  Part Two consists of three chapters. Chapter I sets
out certain general principles and specifies more precisely
the scope of Part Two. Chapter II focuses on the forms
of reparation (restitution, compensation, satisfaction) and
the relations between them. Chapter III deals with the special
situation which arises in case of a serious breach of an
obligation arising under a peremptory norm of general international
law, and specifies certain legal consequences
of such breaches, both for the responsible State and for
other States.
Chapter I
GENERAL PRINCIPLES
Commentary
(1)  Chapter I of Part Two comprises six articles, which
define in general terms the legal consequences of an internationally
wrongful act of a State. Individual breaches
of international law can vary across a wide spectrum from
the comparatively trivial or minor up to cases which imperil
the survival of communities and peoples, the territorial
integrity and political independence of States and the
environment of whole regions. This may be true whether
the obligations in question are owed to one other State
or to some or all States or to the international community
as a whole. But over and above the gravity or effects
of individual cases, the rules and institutions of State responsibility
are significant for the maintenance of respect
for international law and for the achievement of the goals
which States advance through law-making at the international
level.
(2)  Within chapter I, article 28 is an introductory article,
affirming the principle that legal consequences are
423 On the lex specialis principle in relation to State responsibility,
see article 55 and commentary.
entailed whenever there is an internationally wrongful act
of a State.Article 29 indicates that these consequences are
without prejudice to, and do not supplant, the continued
obligation of the responsible State to perform the obligation
breached. This point is carried further by article 30,
which deals with the obligation of cessation and assurances
or guarantees of non-repetition. Article 31 sets out
the general obligation of reparation for injury suffered in
consequence of a breach of international law by a State.
Article 32 makes clear that the responsible State may not
rely on its internal law to avoid the obligations of cessation
and reparation arising under Part Two. Finally, article
33 specifies the scope of the Part, both in terms of the
States to which obligations are owed and also in terms
of certain legal consequences which, because they accrue
directly to persons or entities other than States, are not
covered by Parts Two or Three of the articles.
Article 28.  Legal consequences of an internationally
wrongful act
The international responsibility of a State which is
entailed by an internationally wrongful act in accordance
with the provisions of Part One involves legal consequences
as set out in this Part.
Commentary
(1)  Article 28 serves an introductory function for Part
Two and is expository in character. It links the provisions
of Part One which define when the international responsibility
of a State arises with the provisions of Part Two
which set out the legal consequences which responsibility
for an internationally wrongful act involves.
(2)  The core legal consequences of an internationally
wrongful act set out in Part Two are the obligations of the
responsible State to cease the wrongful conduct (art. 30)
and to make full reparation for the injury caused by the
internationally wrongful act (art. 31). Where the internationally
wrongful act constitutes a serious breach by the
State of an obligation arising under a peremptory norm
of general international law, the breach may entail further
consequences both for the responsible State and for other
States. In particular, all States in such cases have obligations
to cooperate to bring the breach to an end, not to
recognize as lawful the situation created by the breach and
not to render aid or assistance to the responsible State in
maintaining the situation so created (arts. 40–41).
(3)  Article 28 does not exclude the possibility that an
internationally wrongful act may involve legal consequences
in the relations between the State responsible for
that act and persons or entities other than States. This follows
from article 1, which covers all international obligations
of the State and not only those owed to other States.
Thus, State responsibility extends, for example, to human
rights violations and other breaches of international law
where the primary beneficiary of the obligation breached
is not a State. However, while Part One applies to all the
cases in which an internationally wrongful act may be
committed by a State, Part Two has a more limited scope.
It does not apply to obligations of reparation to the extent
88	 Report of the International Law Commission on the work of its fifty-third session
that these arise towards or are invoked by a person or entity
other than a State. In other words, the provisions of
Part Two are without prejudice to any right, arising from
the international responsibility of a State, which may accrue
directly to any person or entity other than a State, and
article 33 makes this clear.
Article 29.  Continued duty of performance
The legal consequences of an internationally wrongful
act under this Part do not affect the continued duty
of the responsible State to perform the obligation
breached.
Commentary
(1)  Where a State commits a breach of an international
obligation, questions as to the restoration and future of the
legal relationship thereby affected are central. Apart from
the question of reparation, two immediate issues arise,
namely, the effect of the responsible State’s conduct on
the obligation which has been breached, and cessation of
the breach if it is continuing. The former question is dealt
with by article 29, the latter by article 30.
(2)  Article 29 states the general principle that the legal
consequences of an internationally wrongful act do not
affect the continued duty of the State to perform the obligation
it has breached. As a result of the internationally
wrongful act, a new set of legal relations is established
between the responsible State and the State or States to
whom the international obligation is owed. But this does
not mean that the pre-existing legal relation established
by the primary obligation disappears. Even if the responsible
State complies with its obligations under Part Two
to cease the wrongful conduct and to make full reparation
for the injury caused, it is not relieved thereby of the
duty to perform the obligation breached. The continuing
obligation to perform an international obligation, notwithstanding
a breach, underlies the concept of a continuing
wrongful act (see article 14) and the obligation of cessation
(see subparagraph (a) of article 30).
(3)  It is true that in some situations the ultimate effect
of a breach of an obligation may be to put an end to the
obligation itself. For example, a State injured by a material
breach of a bilateral treaty may elect to terminate
the treaty.424 But as the relevant provisions of the 1969
Vienna Convention make clear, the mere fact of a breach
and even of a repudiation of a treaty does not terminate
the treaty.425 It is a matter for the injured State to react
to the breach to the extent permitted by the Convention.
The injured State may have no interest in terminating the
treaty as distinct from calling for its continued performance.
Where a treaty is duly terminated for breach, the
termination does not affect legal relationships which have
accrued under the treaty prior to its termination, includ-
424 See footnote 422 above.
425 Indeed, in the Gabˇcíkovo-Nagymaros Project case, ICJ held that
continuing material breaches by both parties did not have the effect of
terminating the 1977 Treaty on the Construction and Operation of the
Gabˇcíkovo-Nagymaros Barrage System (see footnote 27 above), p. 68,
para. 114.
ing the obligation to make reparation for any breach.426 A
breach of an obligation under general international law is
even less likely to affect the underlying obligation, and indeed
will never do so as such. By contrast, the secondary
legal relation of State responsibility arises on the occurrence
of a breach and without any requirement of invocation
by the injured State.
(4)  Article 29 does not need to deal with such contingencies.
All it provides is that the legal consequences of
an internationally wrongful act within the field of State
responsibility do not affect any continuing duty to comply
with the obligation which has been breached. Whether and
to what extent that obligation subsists despite the breach
is a matter not regulated by the law of State responsibility
but by the rules concerning the relevant primary obliga-
tion.
Article 30.  Cessation and non-repetition
The State responsible for the internationally wrongful
act is under an obligation:
(a)  to cease that act, if it is continuing;
(b)  to offer appropriate assurances and guarantees
of non-repetition, if circumstances so require.
Commentary
(1)  Article 30 deals with two separate but linked issues
raised by the breach of an international obligation: the
cessation of the wrongful conduct and the offer of assurances
and guarantees of non-repetition by the responsible
State if circumstances so require. Both are aspects of the
restoration and repair of the legal relationship affected by
the breach. Cessation is, as it were, the negative aspect
of future performance, concerned with securing an end
to continuing wrongful conduct, whereas assurances and
guarantees serve a preventive function and may be described
as a positive reinforcement of future performance.
The continuation in force of the underlying obligation is
a necessary assumption of both, since if the obligation
has ceased following its breach, the question of cessation
does not arise and no assurances and guarantees can be
relevant.427
(2)  Subparagraph (a) of article 30 deals with the obligation
of the State responsible for the internationally wrongful
act to cease the wrongful conduct. In accordance with
article 2, the word “act” covers both acts and omissions.
Cessation is thus relevant to all wrongful acts extending
in time “regardless of whether the conduct of a State is
426 See, e.g., “Rainbow Warrior” (footnote 46 above), p. 266, citing
Lord McNair (dissenting) in Ambatielos, Preliminary Objection,
I.C.J. Reports 1952, p. 28, at p. 63. On that particular point the Court
itself agreed, ibid., p. 45. In the Gabˇcíkovo-Nagymaros Project case,
Hungary accepted that the legal consequences of its termination of
the 1977 Treaty on the Construction and Operation of the GabˇcíkovoNagymaros
Barrage System on account of the breach by Czechoslovakia
were prospective only, and did not affect the accrued rights of either
party (see footnote 27 above), pp. 73–74, paras. 125–127. The Court
held that the Treaty was still in force, and therefore did not address the
question.
427 1969 Vienna Convention, art. 70, para. 1.
	 State responsibility	 89
an action or an omission … since there may be cessation
consisting in abstaining from certain actions”.428
(3)  The tribunal in the “Rainbow Warrior” arbitration
stressed “two essential conditions intimately linked” for
the requirement of cessation of wrongful conduct to arise,
“namely that the wrongful act has a continuing character
and that the violated rule is still in force at the time
in which the order is issued”.429 While the obligation to
cease wrongful conduct will arise most commonly in the
case of a continuing wrongful act,430 article 30 also encompasses
situations where a State has violated an obligation
on a series of occasions, implying the possibility of
further repetitions. The phrase “if it is continuing” at the
end of subparagraph (a) of the article is intended to cover
both situations.
(4)  Cessation of conduct in breach of an international
obligation is the first requirement in eliminating the consequences
of wrongful conduct. With reparation, it is
one of the two general consequences of an internationally
wrongful act. Cessation is often the main focus of the
controversy produced by conduct in breach of an international
obligation.431 It is frequently demanded not only
by States but also by the organs of international organizations
such as the General Assembly and Security Council
in the face of serious breaches of international law. By
contrast, reparation, important though it is in many cases,
may not be the central issue in a dispute between States as
to questions of responsibility.432
(5)  The function of cessation is to put an end to a violation
of international law and to safeguard the continuing
validity and effectiveness of the underlying primary rule.
The responsible State’s obligation of cessation thus protects
both the interests of the injured State or States and
the interests of the international community as a whole in
the preservation of, and reliance on, the rule of law.
(6)  There are several reasons for treating cessation as
more than simply a function of the duty to comply with
the primary obligation. First, the question of cessation
only arises in the event of a breach. What must then occur
depends not only on the interpretation of the primary
obligation but also on the secondary rules relating to rem-
428 “Rainbow Warrior” (see footnote 46 above), p. 270, para. 113.
429 Ibid., para. 114.
430 For the concept of a continuing wrongful act, see paragraphs (3)
to (11) of the commentary to article 14.
431 The focus of the WTO dispute settlement mechanism is on cessation
rather than reparation: MarrakeshAgreement establishing theWorld
Trade Organization, annex 2 (Understanding on Rules and Procedures
governing the Settlement of Disputes), especially article 3, paragraph 7,
which provides for compensation “only if the immediate withdrawal of
the measure is impracticable and as a temporary measure pending the
withdrawal of the measure which is inconsistent with a covered agreement”.
On the distinction between cessation and reparation for WTO
purposes, see, e.g., Report of the Panel, Australia-Subsidies Provided to
Producers and Exporters of Automotive Leather (WT/DS126/RW and
Corr.1), 21 January 2000, para. 6.49.
432 For cases where ICJ has recognized that this may be so, see,
e.g., Fisheries Jurisdiction (Federal Republic of Germany v. Iceland),
Merits, Judgment, I.C.J. Reports 1974, p. 175, at pp. 201–205,
paras. 65–76; and Gabˇcíkovo-Nagymaros Project (footnote 27 above),
p. 81, para. 153. See also C. D. Gray, Judicial Remedies in International
Law (Oxford, Clarendon Press, 1987), pp. 77–92.
edies, and it is appropriate that they are dealt with, at least
in general terms, in articles concerning the consequences
of an internationally wrongful act. Secondly, continuing
wrongful acts are a common feature of cases involving
State responsibility and are specifically dealt with in article
14. There is a need to spell out the consequences of
such acts in Part Two.
(7)  The question of cessation often arises in close connection
with that of reparation, and particularly restitution.
The result of cessation may be indistinguishable
from restitution, for example in cases involving the freeing
of hostages or the return of objects or premises seized.
Nonetheless, the two must be distinguished. Unlike restitution,
cessation is not subject to limitations relating to
proportionality.433 It may give rise to a continuing obligation,
even when literal return to the status quo ante is
excluded or can only be achieved in an approximate way.
(8)  The difficulty of distinguishing between cessation
and restitution is illustrated by the “Rainbow Warrior”
arbitration. New Zealand sought the return of the two
agents to detention on the island of Hao. According to
New Zealand, France was obliged to return them to and
to detain them on the island for the balance of the three
years; that obligation had not expired since time spent
off the island was not to be counted for that purpose. The
tribunal disagreed. In its view, the obligation was for a
fixed term which had expired, and there was no question
of cessation.434 Evidently, the return of the two agents to
the island was of no use to New Zealand if there was no
continuing obligation on the part of France to keep them
there. Thus, a return to the status quo ante may be of little
or no value if the obligation breached no longer exists.
Conversely, no option may exist for an injured State to renounce
restitution if the continued performance of the obligation
breached is incumbent upon the responsible State
and the former State is not competent to release it from
such performance. The distinction between cessation and
restitution may have important consequences in terms of
the obligations of the States concerned.
(9)  Subparagraph (b) of article 30 deals with the obligation
of the responsible State to offer appropriate assurances
and guarantees of non-repetition, if circumstances
so require. Assurances and guarantees are concerned with
the restoration of confidence in a continuing relationship,
although they involve much more flexibility than cessation
and are not required in all cases. They are most commonly
sought when the injured State has reason to believe
that the mere restoration of the pre-existing situation does
not protect it satisfactorily. For example, following repeated
demonstrations against the United States Embassy
in Moscow from 1964 to 1965, President Johnson stated
that:
The U.S. Government must insist that its diplomatic establishments and
personnel be given the protection which is required by international
law and custom and which is necessary for the conduct of diplomatic
relations between states. Expressions of regret and compensation are no
substitute for adequate protection.435
433 See article 35 (b) and commentary.
434 UNRIAA, vol. XX, p. 217, at p. 266, para. 105 (1990).
435 Reprinted in ILM, vol. 4, No. 2 (July 1965), p. 698.
90	 Report of the International Law Commission on the work of its fifty-third session
Such demands are not always expressed in terms of assurances
or guarantees, but they share the characteristics of
being future-looking and concerned with other potential
breaches. They focus on prevention rather than reparation
and they are included in article 30.
(10)  The question whether the obligation to offer assurances
or guarantees of non-repetition may be a legal consequence
of an internationally wrongful act was debated
in the LaGrand case. This concerned an admitted failure
of consular notification contrary to article 36 of the
Vienna Convention on Consular Relations. In its fourth
submission, Germany sought both general and specific
assurances and guarantees as to the means of future compliance
with the Convention. The United States argued
that to give such assurances or guarantees went beyond
the scope of the obligations in the Convention and that
ICJ lacked jurisdiction to require them. In any event, formal
assurances and guarantees were unprecedented and
should not be required. Germany’s entitlement to a remedy
did not extend beyond an apology, which the United
States had given. Alternatively, no assurances or guarantees
were appropriate in the light of the extensive action it
had taken to ensure that federal and State officials would
in future comply with the Convention. On the question of
jurisdiction, the Court held:
that a dispute regarding the appropriate remedies for the violation of
the Convention alleged by Germany is a dispute that arises out of the
interpretation or application of the Convention and thus is within the
Court’s jurisdiction. Where jurisdiction exists over a dispute on a particular
matter, no separate basis for jurisdiction is required by the Court
to consider the remedies a party has requested for the breach of the
obligation … Consequently, the Court has jurisdiction in the present
case with respect to the fourth submission of Germany.436
On the question of appropriateness, the Court noted that
an apology would not be sufficient in any case in which a
foreign national had been “subjected to prolonged detention
or sentenced to severe penalties” following a failure
of consular notification.437 But in the light of information
provided by the United States as to the steps taken to comply
in future, the Court held:
that the commitment expressed by the United States to ensure implementation
of the specific measures adopted in performance of its obligations
under Article 36, paragraph 1 (b), must be regarded as meeting
Germany’s request for a general assurance of non-repetition.438
As to the specific assurances sought by Germany, the
Court limited itself to stating that:
if the United States, notwithstanding its commitment referred to …
should fail in its obligation of consular notification to the detriment
of German nationals, an apology would not suffice in cases where the
individuals concerned have been subjected to prolonged detention or
convicted and sentenced to severe penalties. In the case of such a conviction
and sentence, it would be incumbent upon the United States to
allow the review and reconsideration of the conviction and sentence by
taking account of the violation of the rights set forth in the Conven-
tion.439
436 LaGrand, Judgment (see footnote 119 above), p. 485, para. 48,
citing Factory at Chorzów, Jurisdiction (footnote 34 above).
437 LaGrand, Judgment (see footnote 119 above), p. 512,
para. 123.
438 Ibid., p. 513, para. 124; see also the operative part, p. 516,
para. 128 (6).
439 Ibid., pp. 513–514, para. 125. See also paragraph 127 and the
operative part (para. 128 (7)).
The Court thus upheld its jurisdiction on Germany’s fourth
submission and responded to it in the operative part. It
did not, however, discuss the legal basis for assurances of
non-repetition.
(11)  Assurances or guarantees of non-repetition may be
sought by way of satisfaction (e.g. the repeal of the legislation
which allowed the breach to occur) and there is thus
some overlap between the two in practice.440 However,
they are better treated as an aspect of the continuation
and repair of the legal relationship affected by the breach.
Where assurances and guarantees of non-repetition are
sought by an injured State, the question is essentially the
reinforcement of a continuing legal relationship and the
focus is on the future, not the past. In addition, assurances
and guarantees of non-repetition may be sought by a State
other than an injured State in accordance with article 48.
(12)  Assurances are normally given verbally, while guarantees
of non-repetition involve something more—for example,
preventive measures to be taken by the responsible
State designed to avoid repetition of the breach. With
regard to the kind of guarantees that may be requested,
international practice is not uniform. The injured State
usually demands either safeguards against the repetition
of the wrongful act without any specification of the form
they are to take441 or, when the wrongful act affects its
nationals, assurances of better protection of persons and
property.442 In the LaGrand case, ICJ spelled out with
some specificity the obligation that would arise for the
United States from a future breach, but added that “[t]his
obligation can be carried out in various ways. The choice
of means must be left to the United States”.443 It noted
further that a State may not be in a position to offer a firm
guarantee of non-repetition.444 Whether it could properly
do so would depend on the nature of the obligation in
question.
(13)  In some cases, the injured State may ask the responsible
State to adopt specific measures or to act in a
specified way in order to avoid repetition. Sometimes the
injured State merely seeks assurances from the responsible
State that, in future, it will respect the rights of the injured
State.445 In other cases, the injured State requires specific
instructions to be given,446 or other specific conduct to be
440 See paragraph (5) of the commentary to article 36.
441 In the “Dogger Bank” incident in 1904, the United Kingdom
sought “security against the recurrence of such intolerable incidents”,
G. F. de Martens, Nouveau recueil général de traités, 2nd series,
vol. XXXIII, p. 642. See also the exchange of notes between China
and Indonesia following the attack in March 1966 against the Chinese
Consulate General in Jakarta, in which the Chinese Deputy Minister
for Foreign Affairs sought a guarantee that such incidents would not be
repeated in the future, RGDIP, vol. 70 (1966), pp. 1013 et seq.
442 Such assurances were given in the Doane incident (1886), Moore,
Digest, vol. VI, pp. 345–346.
443 LaGrand, Judgment (see footnote 119 above), p. 513, para. 125.
444 Ibid., para. 124.
445 See, e.g., the 1901 case in which the Ottoman Empire gave a
formal assurance that the British, Austrian and French postal services
would henceforth operate freely in its territory, RGDIP, vol. 8 (1901),
p. 777, at pp. 788 and 792.
446 See, e.g., the incidents involving the “Herzog” and the “Bundesrath”,
two German ships seized by the British Navy in December
1899 and January 1900, during the Boer war, in which Germany drew
the attention of Great Britain to “the necessity for issuing instructions
	 State responsibility	 91
taken.447 But assurances and guarantees of non-repetition
will not always be appropriate, even if demanded. Much
will depend on the circumstances of the case, including
the nature of the obligation and of the breach. The rather
exceptional character of the measures is indicated by the
words “if circumstances so require” at the end of subparagraph
(b). The obligation of the responsible State with
respect to assurances and guarantees of non-repetition is
formulated in flexible terms in order to prevent the kinds
of abusive or excessive claims which characterized some
demands for assurances and guarantees by States in the
past.
Article 31.  Reparation
1.  The responsible State is under an obligation to
make full reparation for the injury caused by the internationally
wrongful act.
2.  Injury includes any damage, whether material
or moral, caused by the internationally wrongful act
of a State.
Commentary
(1)  The obligation to make full reparation is the second
general obligation of the responsible State consequent
upon the commission of an internationally wrongful act.
The general principle of the consequences of the commission
of an internationally wrongful act was stated by PCIJ
in the Factory at Chorzów case:
It is a principle of international law that the breach of an engagement
involves an obligation to make reparation in an adequate form. Reparation
therefore is the indispensable complement of a failure to apply a
convention and there is no necessity for this to be stated in the convention
itself. Differences relating to reparations, which may be due by
reason of failure to apply a convention, are consequently differences
relating to its application.448
In this passage, which has been cited and applied on many
occasions,449 the Court was using the term “reparation”
in its most general sense. It was rejecting a Polish argument
that jurisdiction to interpret and apply a treaty did
not entail jurisdiction to deal with disputes over the form
and quantum of reparation to be made. By that stage of the
dispute, Germany was no longer seeking for its national
the return of the factory in question or of the property
seized with it.
to the British Naval Commanders to molest no German merchantmen in
places not in the vicinity of the seat of war”, Martens, op. cit. (footnote
441 above), vol. XXIX, p. 456 at p. 486.
447 In the Trail Smelter case (see footnote 253 above), the arbitral
tribunal specified measures to be adopted by the Trail Smelter, including
measures designed to “prevent future significant fumigations in
the United States” (p. 1934). Requests to modify or repeal legislation
are frequently made by international bodies. See, e.g., the decisions of
the Human Rights Committee: Torres Ramirez v. Uruguay, decision of
23 July 1980, Official Records of the General Assembly, Thirty-fifth
Session, Supplement No. 40 (A/35/40), p. 126, para. 19; Lanza v.
Uruguay, decision of 3 April 1980, ibid., p. 119, para. 17; and Dermit
Barbato v. Uruguay, decision of 21 October 1982, ibid., Thirty-eighth
Session, Supplement No. 40 (A/38/40), p. 133, para. 11.
448 Factory at Chorzów, Jurisdiction (see footnote 34 above).
449 Cf. the ICJ reference to this decision in LaGrand, Judgment
(footnote 119 above), p. 485, para. 48.
(2)  In a subsequent phase of the same case, the Court
went on to specify in more detail the content of the obligation
of reparation. It said:
The essential principle contained in the actual notion of an illegal
act—a principle which seems to be established by international practice
and in particular by the decisions of arbitral tribunals—is that reparation
must, as far as possible, wipe out all the consequences of the illegal
act and reestablish the situation which would, in all probability, have
existed if that act had not been committed. Restitution in kind, or, if this
is not possible, payment of a sum corresponding to the value which a
restitution in kind would bear; the award, if need be, of damages for loss
sustained which would not be covered by restitution in kind or payment
in place of it—such are the principles which should serve to determine
the amount of compensation due for an act contrary to international
law.450
In the first sentence, the Court gave a general definition of
reparation, emphasizing that its function was the re-establishment
of the situation affected by the breach.451 In the
second sentence, it dealt with that aspect of reparation encompassed
by “compensation” for an unlawful act—that
is, restitution or its value, and in addition damages for loss
sustained as a result of the wrongful act.
(3)  The obligation placed on the responsible State by
article 31 is to make “full reparation” in the Factory at
Chorzów sense. In other words, the responsible State must
endeavour to “wipe out all the consequences of the illegal
act and reestablish the situation which would, in all probability,
have existed if that act had not been committed”452
through the provision of one or more of the forms of reparation
set out in chapter II of this part.
(4)  The general obligation of reparation is formulated
in article 31 as the immediate corollary of a State’s responsibility,
i.e. as an obligation of the responsible State
resulting from the breach, rather than as a right of an injured
State or States. This formulation avoids the difficulties
that might arise where the same obligation is owed
simultaneously to several, many or all States, only a few
of which are specially affected by the breach. But quite
apart from the questions raised when there is more than
one State entitled to invoke responsibility,453 the general
obligation of reparation arises automatically upon commission
of an internationally wrongful act and is not, as
such, contingent upon a demand or protest by any State,
even if the form which reparation should take in the circumstances
may depend on the response of the injured
State or States.
(5)  The responsible State’s obligation to make full reparation
relates to the “injury caused by the internationally
wrongful act”. The notion of “injury”, defined in paragraph
2, is to be understood as including any damage
caused by that act. In particular, in accordance with paragraph
2, “injury” includes any material or moral damage
caused thereby. This formulation is intended both as inclusive,
covering both material and moral damage broadly
understood, and as limitative, excluding merely abstract
concerns or general interests of a State which is individu-
450 Factory at Chorzów, Merits (see footnote 34 above), p. 47.
451 Cf. P.-M. Dupuy, “Le fait générateur de la responsabilité internationale
des États”, Collected Courses ... 1984–V (Dordrecht, Martinus
Nijhoff, 1986), vol. 188, p. 9, at p. 94, who uses the term restauration.
452 Factory at Chorzów, Merits (see footnote 34 above), p. 47.
453 For the States entitled to invoke responsibility, see articles 42
and 48 and commentaries. For the situation where there is a plurality of
injured States, see article 46 and commentary.
92	 Report of the International Law Commission on the work of its fifty-third session
ally unaffected by the breach.454 “Material” damage here
refers to damage to property or other interests of the State
and its nationals which is assessable in financial terms.
“Moral” damage includes such items as individual pain
and suffering, loss of loved ones or personal affront associated
with an intrusion on one’s home or private life.
Questions of reparation for such forms of damage are
dealt with in more detail in chapter II of this Part.455
(6)  The question whether damage to a protected interest
is a necessary element of an internationally wrongful act
has already been discussed.456 There is in general no such
requirement; rather this is a matter which is determined
by the relevant primary rule. In some cases, the gist of a
wrong is the causing of actual harm to another State. In
some cases what matters is the failure to take necessary
precautions to prevent harm even if in the event no harm
occurs. In some cases there is an outright commitment to
perform a specified act, e.g. to incorporate uniform rules
into internal law. In each case the primary obligation will
determine what is required. Hence, article 12 defines a
breach of an international obligation as a failure to conform
with an obligation.
(7)  As a corollary there is no general requirement, over
and above any requirements laid down by the relevant
primary obligation, that a State should have suffered material
harm or damage before it can seek reparation for
a breach. The existence of actual damage will be highly
relevant to the form and quantum of reparation. But there
is no general requirement of material harm or damage for
a State to be entitled to seek some form of reparation. In
the “Rainbow Warrior” arbitration it was initially argued
that “in the theory of international responsibility, damage
is necessary to provide a basis for liability to make reparation”,
but the parties subsequently agreed that:
Unlawful action against non-material interests, such as acts affecting the
honor, dignity or prestige of a State, entitle the victim State to receive
adequate reparation, even if those acts have not resulted in a pecuniary
or material loss for the claimant State.457
The tribunal held that the breach by France had “provoked
indignation and public outrage in New Zealand and caused
a new, additional non-material damage … of a moral, political
and legal nature, resulting from the affront to the
dignity and prestige not only of New Zealand as such, but
of its highest judicial and executive authorities as well”.458
454 Although not individually injured, such States may be entitled to
invoke responsibility in respect of breaches of certain classes of obligation
in the general interest, pursuant to article 48. Generally on
notions of injury and damage, see B. Bollecker-Stern, Le préjudice dans
la théorie de la responsabilité internationale (Paris, Pedone, 1973);
B. Graefrath, “Responsibility and damages caused: relationship between
responsibility and damages”, Collected Courses ... 1984–II
(The Hague, Nijhoff, 1985), vol. 185, p. 95; A. Tanzi, “Is damage a
distinct condition for the existence of an internationally wrongful
act?”, Spinedi and Simma, eds., op. cit. (footnote 175 above), p. 1; and
Brownlie, System of the Law of Nations … (footnote 92 above),
pp. 53–88.
455 See especially article 36 and commentary.
456 See paragraph (9) of the commentary to article 2.
457 “Rainbow Warrior” (see footnote 46 above), pp. 266–267,
paras. 107 and 109.
458 Ibid., p. 267, para. 110.
(8)  Where two States have agreed to engage in particular
conduct, the failure by one State to perform the obligation
necessarily concerns the other. A promise has been broken
and the right of the other State to performance correspondingly
infringed. For the secondary rules of State responsibility
to intervene at this stage and to prescribe that
there is no responsibility because no identifiable harm or
damage has occurred would be unwarranted. If the parties
had wished to commit themselves to that formulation of
the obligation they could have done so. In many cases,
the damage that may follow from a breach (e.g. harm
to a fishery from fishing in the closed season, harm to
the environment by emissions exceeding the prescribed
limit, abstraction from a river of more than the permitted
amount) may be distant, contingent or uncertain. Nonetheless,
States may enter into immediate and unconditional
commitments in their mutual long-term interest in such
fields. Accordingly, article 31 defines “injury” in a broad
and inclusive way, leaving it to the primary obligations to
specify what is required in each case.
(9)  Paragraph 2 addresses a further issue, namely the
question of a causal link between the internationally
wrongful act and the injury. It is only “[i]njury … caused
by the internationally wrongful act of a State” for which
full reparation must be made. This phrase is used to make
clear that the subject matter of reparation is, globally, the
injury resulting from and ascribable to the wrongful act,
rather than any and all consequences flowing from an
internationally wrongful act.
(10)  The allocation of injury or loss to a wrongful act is,
in principle, a legal and not only a historical or causal process.Various
terms are used to describe the link which must
exist between the wrongful act and the injury in order for
the obligation of reparation to arise. For example, reference
may be made to losses “attributable to [the wrongful]
act as a proximate cause”,459 or to damage which is “too
indirect, remote, and uncertain to be appraised”,460 or to
“any direct loss, damage including environmental damage
and the depletion of natural resources or injury to foreign
Governments, nationals and corporations as a result of”
the wrongful act.461 Thus, causality in fact is a necessary
459 See United States-German Mixed Claims Commission, Administrative
Decision No. II, UNRIAA, vol. VII (Sales No. 1956.V.5),
p. 23, at p. 30 (1923). See also Dix (footnote 178 above), p. 121, and the
Canadian statement of claim following the disintegration of the Cosmos
954 Soviet nuclear-powered satellite over its territory in 1978, ILM,
vol. 18 (1979), p. 907, para. 23.
460 See the Trail Smelter arbitration (footnote 253 above), p. 1931.
See also A. Hauriou, “Les dommages indirects dans les arbitrages internationaux”,
RGDIP, vol. 31 (1924), p. 209, citing the “Alabama” arbitration
as the most striking application of the rule excluding “indirect”
damage (footnote 87 above).
461 Security Council resolution 687 (1991) of 3 April 1991, para. 16.
This was a resolution adopted with reference to ChapterVII of the Charter
of the United Nations, but it is expressed to reflect Iraq’s liability
“under international law … as a result of its unlawful invasion and occupation
of Kuwait”. UNCC and its Governing Council have provided
some guidance on the interpretation of the requirements of directness
and causation under paragraph 16. See, e.g., Recommendations made
by the panel of Commissioners concerning individual claims for serious
personal injury or death (category “B” claims), report of 14 April 1994
(S/AC.26/1994/1), approved by the Governing Council in its decision
20 of 26 May 1994 (S/AC.26/Dec.20 (1994)); Report and recommendations
made by the panel of Commissioners appointed to review the
Well Blowout Control Claim (the “WBC claim”), of 15 November 1996
(S/AC.26/1996/5/Annex), paras. 66–86, approved by the Governing
	 State responsibility	 93
but not a sufficient condition for reparation. There is a
further element, associated with the exclusion of injury
that is too “remote” or “consequential” to be the subject
of reparation. In some cases, the criterion of “directness”
may be used,462 in others “foreseeability”463 or “proximity”.464
But other factors may also be relevant: for example,
whether State organs deliberately caused the harm in
question, or whether the harm caused was within the ambit
of the rule which was breached, having regard to the purpose
of that rule.465 In other words, the requirement of a
causal link is not necessarily the same in relation to every
breach of an international obligation. In international as
in national law, the question of remoteness of damage “is
not a part of the law which can be satisfactorily solved
by search for a single verbal formula”.466 The notion of a
sufficient causal link which is not too remote is embodied
in the general requirement in article 31 that the
injury should be in consequence of the wrongful act, but
without the addition of any particular qualifying phrase.
(11)  A further element affecting the scope of reparation
is the question of mitigation of damage. Even the wholly
innocent victim of wrongful conduct is expected to act
reasonably when confronted by the injury. Although often
expressed in terms of a “duty to mitigate”, this is not a
legal obligation which itself gives rise to responsibility. It
is rather that a failure to mitigate by the injured party may
preclude recovery to that extent.467 The point was clearly
made in this sense by ICJ in the Gabˇcíkovo-Nagymaros
Project case:
Slovakia also maintained that it was acting under a duty to mitigate
damages when it carried out Variant C. It stated that “It is a general
principle of international law that a party injured by the non-performance
of another contract party must seek to mitigate the damage he has
sustained”.
It would follow from such a principle that an injured State which has
failed to take the necessary measures to limit the damage sustained
would not be entitled to claim compensation for that damage which
could have been avoided. While this principle might thus provide a baCouncil
in its decision 40 of 17 December 1996 (S/AC.26/Dec.40
(1996)).
462 As in Security Council resolution 687 (1991), para. 16.
463 See, e.g., the “Naulilaa” case (footnote 337 above), p. 1031.
464 For comparative reviews of issues of causation and remoteness,
see, e.g., H. L. A. Hart and A. M. Honoré, Causation in the Law, 2nd
ed. (Oxford, Clarendon Press, 1985); A. M. Honoré, “Causation and
remoteness of damage”, International Encyclopedia of Comparative
Law, A. Tunc, ed. (Tübingen, Mohr/The Hague, Martinus Nijhoff,
1983), vol. XI, part I, chap. 7; Zweigert and Kötz, op. cit. (footnote 251
above), pp. 601–627, in particular pp. 609 et seq.; and B. S. Markesinis,
The German Law of Obligations: Volume II The Law of Torts: A
Comparative Introduction, 3rd ed. (Oxford, Clarendon Press, 1997),
pp. 95–108, with many references to the literature.
465 See, e.g., the decision of the Iran-United States Claims Tribunal
in The Islamic Republic of Iran v. The United States of America, cases
A15 (IV) and A24, Award No. 590–A15 (IV)/A24–FT, 28 December
1998, World Trade and Arbitration Materials, vol. 11, No. 2 (1999),
p. 45.
466 P. S. Atiyah, An Introduction to the Law of Contract, 5th ed.
(Oxford, Clarendon Press, 1995), p. 466.
467 In the WBC claim, a UNCC panel noted that “under the general
principles of international law relating to mitigation of damages
… the Claimant was not only permitted but indeed obligated to take
reasonable steps to … mitigate the loss, damage or injury being caused”
report of 15 November 1996 (S/AC.26/1996/5/Annex) (see footnote
461 above), para. 54.
sis for the calculation of damages, it could not, on the other hand, justify
an otherwise wrongful act.468
(12)  Often two separate factors combine to cause damage.
In the United States Diplomatic and Consular Staff in
Tehran case,469 the initial seizure of the hostages by militant
students (not at that time acting as organs or agents
of the State) was attributable to the combination of the
students’ own independent action and the failure of the
Iranian authorities to take necessary steps to protect the
embassy. In the Corfu Channel case,470 the damage to the
British ships was caused both by the action of a third State
in laying the mines and the action of Albania in failing to
warn of their presence. Although, in such cases, the injury
in question was effectively caused by a combination
of factors, only one of which is to be ascribed to the responsible
State, international practice and the decisions
of international tribunals do not support the reduction or
attenuation of reparation for concurrent causes,471 except
in cases of contributory fault.472 In the Corfu Channel
case, for example, the United Kingdom recovered the full
amount of its claim against Albania based on the latter’s
wrongful failure to warn of the mines even though Albania
had not itself laid the mines.473 Such a result should
follow a fortiori in cases where the concurrent cause is
not the act of another State (which might be held separately
responsible) but of private individuals, or some natural
event such as a flood. In the United States Diplomatic
and Consular Staff in Tehran case, the Islamic Republic
of Iran was held to be fully responsible for the detention
of the hostages from the moment of its failure to protect
them.474
(13)  It is true that cases can occur where an identifiable
element of injury can properly be allocated to one of several
concurrently operating causes alone. But unless some
part of the injury can be shown to be severable in causal
terms from that attributed to the responsible State, the latter
is held responsible for all the consequences, not being
too remote, of its wrongful conduct. Indeed, in the Zafiro
claim the tribunal went further and in effect placed the
468 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 55,
para. 80.
469 United States Diplomatic and Consular Staff in Tehran (see footnote
59 above), pp. 29–32.
470 Corfu Channel, Merits (see footnote 35 above), pp. 17–18 and
22–23.
471 This approach is consistent with the way in which these issues are
generally dealt with in national law. “It is the very general rule that if
a tortfeasor’s behaviour is held to be a cause of the victim’s harm, the
tortfeasor is liable to pay for all of the harm so caused, notwithstanding
that there was a concurrent cause of that harm and that another is
responsible for that cause … In other words, the liability of a tortfeasor
is not affected vis-à-vis the victim by the consideration that another is
concurrently liable.”: T. Weir, “Complex liabilities”, A. Tunc, ed., op.
cit. (footnote 464 above), part 2, chap. 12, p. 43. The United States
relied on this comparative law experience in its pleadings in the Aerial
Incident of 27 July 1955 case when it said, referring to Article 38,
paragraph 1 (c) and (d), of the ICJ Statute, that “in all civilized countries
the rule is substantially the same. An aggrieved plaintiff may sue any or
all joint tortfeasors, jointly or severally, although he may collect from
them, or any one or more of them, only the full amount of his damage”
(Memorial of 2 December 1958 (see footnote 363 above), p. 229).
472 See article 39 and commentary.
473 See Corfu Channel, Assessment of Amount of Compensation,
Judgment, I.C.J. Reports 1949, p. 244, at p. 250.
474 United States Diplomatic and Consular Staff in Tehran (see
footnote 59 above), pp. 31–33.
94	 Report of the International Law Commission on the work of its fifty-third session
onus on the responsible State to show what proportion of
the damage was not attributable to its conduct. It said:
We think it clear that not all of the damage was done by the Chinese
crew of the Zafiro. The evidence indicates that an unascertainable part
was done by Filipino insurgents, and makes it likely that some part was
done by the Chinese employees of the company. But we do not consider
that the burden is on Great Britain to prove exactly what items of damage
are chargeable to the Zafiro. As the Chinese crew of the Zafiro are
shown to have participated to a substantial extent and the part chargeable
to unknown wrongdoers can not be identified, we are constrained
to hold the United States liable for the whole.
In view, however, of our finding that a considerable, though unascertainable,
part of the damage is not chargeable to the Chinese crew of the
Zafiro, we hold that interest on the claims should not be allowed.475
(14)  Concerns are sometimes expressed that a general
principle of reparation of all loss flowing from a breach
might lead to reparation which is out of all proportion to
the gravity of the breach. However, the notion of “proportionality”
applies differently to the different forms of
reparation.476 It is addressed, as appropriate, in the individual
articles in chapter II dealing with the forms of
reparation.
Article 32.  Irrelevance of internal law
The responsible State may not rely on the provisions
of its internal law as justification for failure to comply
with its obligations under this Part.
Commentary
(1)  Article 3 concerns the role of internal law in the
characterization of an act as wrongful. Article 32 makes
clear the irrelevance of a State’s internal law to compliance
with the obligations of cessation and reparation. It
provides that a State which has committed an internationally
wrongful act may not invoke its internal law as
a justification for failure to comply with its obligations
under this part. Between them, articles 3 and 32 give effect
for the purposes of State responsibility to the general
principle that a State may not rely on its internal law as a
justification for its failure to comply with its international
obligations.477Although practical difficulties may arise
for a State organ confronted with an obstacle to compliance
posed by the rules of the internal legal system under
which it is bound to operate, the State is not entitled
to oppose its internal law or practice as a legal barrier to
the fulfilment of an international obligation arising under
Part Two.
(2)  Article 32 is modelled on article 27 of the 1969
Vienna Convention, which provides that a party may not
invoke the provisions of its internal law as justification
for its failure to perform a treaty. This general principle
is equally applicable to the international obligations
deriving from the rules of State responsibility set out in
Part Two. The principle may be qualified by the relevant
primary rule, or by a lex specialis, such as article 50 of the
European Convention on Human Rights, which provides
for just satisfaction in lieu of full reparation “if the inter-
475 The Zafiro case (see footnote 154 above), pp. 164–165.
476 See articles 35 (b), 37, paragraph 3, and 39 and commentaries.
477 See paragraphs (2) to (4) of the commentary to article 3.
nal law of the High Contracting Party concerned allows
only partial reparation to be made”.478
(3)  The principle that a responsible State may not rely
on the provisions of its internal law as justification for
failure to comply with its obligations arising out of the
commission of an internationally wrongful act is supported
both by State practice and international decisions.
For example, the dispute between Japan and the United
States in 1906 over California’s discriminatory education
policies was resolved by the revision of the Californian
legislation.479 In the incident concerning article 61, paragraph
2, of the Weimar Constitution (Constitution of
the Reich of 11 August 1919), a constitutional amendment
was provided for in order to ensure the discharge
of the obligation deriving from article 80 of the Treaty
of Peace between the Allied and Associated Powers and
Germany (Treaty of Versailles).480 In the Peter Pázmány
University case, PCIJ specified that the property to be
returned should be “freed from any measure of transfer,
compulsory administration, or sequestration”.481 In short,
international law does not recognize that the obligations
of a responsible State under Part Two are subject to the
State’s internal legal system nor does it allow internal law
to count as an excuse for non-performance of the obligations
of cessation and reparation.
Article 33.  Scope of international obligations
set out in this Part
1.  The obligations of the responsible State set out
in this Part may be owed to another State, to several
States, or to the international community as a whole,
depending in particular on the character and content
of the international obligation and on the circumstances
of the breach.
2.  This Part is without prejudice to any right, arising
from the international responsibility of a State,
which may accrue directly to any person or entity
other than a State.
Commentary
(1)  Article 33 concludes the provisions of chapter I of
Part Two by clarifying the scope and effect of the international
obligations covered by the Part. In particular, paragraph
1 makes it clear that identifying the State or States
towards which the responsible State’s obligations in Part
Two exist depends both on the primary rule establishing
478 Article 41 of the Convention, as amended by Protocol No. 11 to
the Convention for the Protection of Human Rights and Fundamental
Freedoms, restructuring the control machinery established thereby.
Other examples include article 32 of the Revised General Act for the
Pacific Settlement of International Disputes and article 30 of the European
Convention for the Peaceful Settlement of Disputes.
479 See R. L. Buell, “The development of the anti-Japanese agitation
in the United States”, Political Science Quarterly, vol. 37 (1922),
pp. 620 et seq.
480 See British and Foreign State Papers, 1919 (London, HM
Stationery Office, 1922), vol. 112, p. 1094.
481 Appeal from a Judgment of the Hungaro/Czechoslovak Mixed
Arbitral Tribunal (The Peter Pázmány University), Judgment, 1933,
P.C.I.J., Series A/B, No. 61, p. 208, at p. 249.
	 State responsibility	 95
the obligation that was breached and on the circumstances
of the breach. For example, pollution of the sea, if it
is massive and widespread, may affect the international
community as a whole or the coastal States of a region;
in other circumstances it might only affect a single neighbouring
State. Evidently, the gravity of the breach may
also affect the scope of the obligations of cessation and
reparation.
(2)  In accordance with paragraph 1, the responsible
State’s obligations in a given case may exist towards another
State, several States or the international community
as a whole. The reference to several States includes the
case in which a breach affects all the other parties to a
treaty or to a legal regime established under customary
international law. For instance, when an obligation can be
defined as an “integral” obligation, the breach by a State
necessarily affects all the other parties to the treaty.482
(3)  When an obligation of reparation exists towards a
State, reparation does not necessarily accrue to that State’s
benefit. For instance, a State’s responsibility for the breach
of an obligation under a treaty concerning the protection of
human rights may exist towards all the other parties to the
treaty, but the individuals concerned should be regarded
as the ultimate beneficiaries and in that sense as the holders
of the relevant rights. Individual rights under international
law may also arise outside the framework of human
rights.483 The range of possibilities is demonstrated from
the ICJ judgment in the LaGrand case, where the Court
held that article 36 of the Vienna Convention on Consular
Relations “creates individual rights, which, by virtue of
Article I of the Optional Protocol, may be invoked in this
Court by the national State of the detained person”.484
(4)  Such possibilities underlie the need for paragraph 2
of article 33. Part Two deals with the secondary obligations
of States in relation to cessation and reparation, and
those obligations may be owed, inter alia, to one or several
States or to the international community as a whole.
In cases where the primary obligation is owed to a nonState
entity, it may be that some procedure is available
whereby that entity can invoke the responsibility on its
own account and without the intermediation of any State.
This is true, for example, under human rights treaties
which provide a right of petition to a court or some other
body for individuals affected. It is also true in the case
of rights under bilateral or regional investment protection
agreements. Part Three is concerned with the invocation
of responsibility by other States, whether they are to be
considered “injured States” under article 42, or other interested
States under article 48, or whether they may be
exercising specific rights to invoke responsibility under
some special rule (art. 55). The articles do not deal with
the possibility of the invocation of responsibility by persons
or entities other than States, and paragraph 2 makes
this clear. It will be a matter for the particular primary rule
482 See further article 42 (b) (ii) and commentary.
483 Cf. Jurisdiction of the Courts of Danzig (footnote 82 above),
pp. 17–21.
484 LaGrand, Judgment (see footnote 119 above), para. 77. In the
circumstances the Court did not find it necessary to decide whether
the individual rights had “assumed the character of a human right”
(para. 78).
to determine whether and to what extent persons or entities
other than States are entitled to invoke responsibility
on their own account. Paragraph 2 merely recognizes the
possibility: hence the phrase “which may accrue directly
to any person or entity other than a State”.
Chapter II
REPARATION FOR INJURY
Commentary
Chapter II deals with the forms of reparation for injury,
spelling out in further detail the general principle stated
in article 31, and in particular seeking to establish more
clearly the relations between the different forms of reparation,
viz. restitution, compensation and satisfaction, as
well as the role of interest and the question of taking into
account any contribution to the injury which may have
been made by the victim.
Article 34.  Forms of reparation
Full reparation for the injury caused by the internationally
wrongful act shall take the form of restitution,
compensation and satisfaction, either singly or in
combination, in accordance with the provisions of this
chapter.
Commentary
(1)  Article 34 introduces chapter II by setting out the
forms of reparation which separately or in combination
will discharge the obligation to make full reparation for
the injury caused by the internationally wrongful act.
Since the notion of “injury” and the necessary causal link
between the wrongful act and the injury are defined in the
statement of the general obligation to make full reparation
in article 31,485 article 34 need do no more than refer to
“[f]ull reparation for the injury caused”.
(2)  In the Factory at Chorzów case, the injury was a
material one and PCIJ dealt only with two forms of reparation,
restitution and compensation.486 In certain cases,
satisfaction may be called for as an additional form of
reparation. Thus, full reparation may take the form of
restitution, compensation and satisfaction, as required
by the circumstances. Article 34 also makes it clear that
full reparation may only be achieved in particular cases
by the combination of different forms of reparation. For
example, re-establishment of the situation which existed
before the breach may not be sufficient for full reparation
because the wrongful act has caused additional material
damage (e.g. injury flowing from the loss of the use of
property wrongfully seized). Wiping out all the consequences
of the wrongful act may thus require some or all
forms of reparation to be provided, depending on the type
and extent of the injury that has been caused.
485 See paragraphs (4) to (14) of the commentary to article 31.
486 Factory at Chorzów, Merits (see footnote 34 above), p. 47.
96	 Report of the International Law Commission on the work of its fifty-third session
(3)  The primary obligation breached may also play an
important role with respect to the form and extent of reparation.
In particular, in cases of restitution not involving
the return of persons, property or territory of the injured
State, the notion of reverting to the status quo ante has to
be applied having regard to the respective rights and competences
of the States concerned. This may be the case,
for example, where what is involved is a procedural obligation
conditioning the exercise of the substantive powers
of a State. Restitution in such cases should not give the
injured State more than it would have been entitled to if
the obligation had been performed.487
(4)  The provision of each of the forms of reparation described
in article 34 is subject to the conditions laid down
in the articles which follow it in chapter II. This limitation
is indicated by the phrase “in accordance with the
provisions of this chapter”. It may also be affected by any
valid election that may be made by the injured State as
between different forms of reparation. For example, in
most circumstances the injured State is entitled to elect to
receive compensation rather than restitution. This element
of choice is reflected in article 43.
(5)  Concerns have sometimes been expressed that the
principle of full reparation may lead to disproportionate
and even crippling requirements so far as the responsible
State is concerned. The issue is whether the principle
of proportionality should be articulated as an aspect of
the obligation to make full reparation. In these articles,
proportionality is addressed in the context of each form
of reparation, taking into account its specific character.
Thus, restitution is excluded if it would involve a burden
out of all proportion to the benefit gained by the injured
State or other party.488 Compensation is limited to damage
actually suffered as a result of the internationally
wrongful act, and excludes damage which is indirect or
remote.489 Satisfaction must “not be out of proportion to
the injury”.490 Thus, each of the forms of reparation takes
such considerations into account.
(6)  The forms of reparation dealt with in chapter II represent
ways of giving effect to the underlying obligation
of reparation set out in article 31. There are not, as it were,
separate secondary obligations of restitution, compensation
and satisfaction. Some flexibility is shown in practice
in terms of the appropriateness of requiring one form of
reparation rather than another, subject to the requirement
of full reparation for the breach in accordance with article
31.491 To the extent that one form of reparation is dispensed
with or is unavailable in the circumstances, others,
487 Thus, in the judgment in the LaGrand case (see footnote 119
above), ICJ indicated that a breach of the notification requirement in
article 36 of the Vienna Convention on Consular Relations, leading to
a severe penalty or prolonged detention, would require reconsideration
of the fairness of the conviction “by taking account of the violation of
the rights set forth in the Convention” (p. 514, para. 125). This would
be a form of restitution which took into account the limited character
of the rights in issue.
488 See article 35 (b) and commentary.
489 See article 31 and commentary.
490 See article 37, paragraph 3, and commentary.
491 For example, the Mélanie Lachenal case (UNRIAA, vol. XIII
(Sales No. 64.V.3), p. 117, at pp. 130–131 (1954)), where compensation
was accepted in lieu of restitution originally decided upon, the
Franco-Italian Conciliation Commission having agreed that restitution
especially compensation, will be correspondingly more
important.
Article 35.  Restitution
A State responsible for an internationally wrongful
act is under an obligation to make restitution, that
is, to re-establish the situation which existed before
the wrongful act was committed, provided and to the
extent that restitution:
(a)  is not materially impossible;
(b)  does not involve a burden out of all proportion
to the benefit deriving from restitution instead of
compensation.
Commentary
(1)  In accordance with article 34, restitution is the first
of the forms of reparation available to a State injured by
an internationally wrongful act. Restitution involves the
re-establishment as far as possible of the situation which
existed prior to the commission of the internationally
wrongful act, to the extent that any changes that have occurred
in that situation may be traced to that act. In its
simplest form, this involves such conduct as the release
of persons wrongly detained or the return of property
wrongly seized. In other cases, restitution may be a more
complex act.
(2)  The concept of restitution is not uniformly defined.
According to one definition, restitution consists in reestablishing
the status quo ante, i.e. the situation that existed
prior to the occurrence of the wrongful act. Under
another definition, restitution is the establishment or reestablishment
of the situation that would have existed if the
wrongful act had not been committed. The former definition
is the narrower one; it does not extend to the compensation
which may be due to the injured party for loss suffered,
for example for loss of the use of goods wrongfully
detained but subsequently returned. The latter definition
absorbs into the concept of restitution other elements of
full reparation and tends to conflate restitution as a form
of reparation and the underlying obligation of reparation
itself. Article 35 adopts the narrower definition which has
the advantage of focusing on the assessment of a factual
situation and of not requiring a hypothetical inquiry into
what the situation would have been if the wrongful act
had not been committed. Restitution in this narrow sense
may of course have to be completed by compensation in
order to ensure full reparation for the damage caused, as
article 36 makes clear.
(3)  Nonetheless, because restitution most closely conforms
to the general principle that the responsible State is
bound to wipe out the legal and material consequences of
its wrongful act by re-establishing the situation that would
exist if that act had not been committed, it comes first
among the forms of reparation. The primacy of restitution
was confirmed by PCIJ in the Factory at Chorzów
would require difficult internal procedures. See also paragraph (4) of the
commentary to article 35.
	 State responsibility	 97
case when it said that the responsible State was under “the
obligation to restore the undertaking and, if this be not
possible, to pay its value at the time of the indemnification,
which value is designed to take the place of restitution
which has become impossible”. The Court went on
to add that “[t]he impossibility, on which the Parties are
agreed, of restoring the Chorzów factory could therefore
have no other effect but that of substituting payment of
the value of the undertaking for restitution”.492 It can be
seen in operation in the cases where tribunals have considered
compensation only after concluding that, for one
reason or another, restitution could not be effected.493 Despite
the difficulties restitution may encounter in practice,
States have often insisted upon claiming it in preference
to compensation. Indeed, in certain cases, especially those
involving the application of peremptory norms, restitution
may be required as an aspect of compliance with the primary
obligation.
(4)  On the other hand, there are often situations where
restitution is not available or where its value to the injured
State is so reduced that other forms of reparation take
priority. Questions of election as between different forms
of reparation are dealt with in the context of Part Three.494
But quite apart from valid election by the injured State or
other entity, the possibility of restitution may be practically
excluded, e.g. because the property in question has
been destroyed or fundamentally changed in character or
the situation cannot be restored to the status quo ante for
some reason. Indeed, in some cases tribunals have inferred
from the terms of the compromis or the positions of the
parties what amounts to a discretion to award compensation
rather than restitution. For example, in the Walter
Fletcher Smith case, the arbitrator, while maintaining that
restitution should be appropriate in principle, interpreted
the compromis as giving him a discretion to award compensation
and did so in “the best interests of the parties,
and of the public”.495 In the Aminoil arbitration, the parties
agreed that restoration of the status quo ante following
the annulment of the concession by the Kuwaiti decree
would be impracticable.496
(5)  Restitution may take the form of material restoration
or return of territory, persons or property, or the reversal
of some juridical act, or some combination of them. Examples
of material restitution include the release of detained
individuals, the handing over to a State of an indi-
492 Factory at Chorzów, Merits (see footnote 34 above), p. 48.
493 See, e.g., British Claims in the Spanish Zone of Morocco (footnote
44 above), pp. 621–625 and 651–742; Religious Property Expropriated
by Portugal, UNRIAA, vol. I (Sales No. 1948.V.2), p. 7 (1920);
Walter Fletcher Smith, ibid., vol. II (Sales No. 1949.V.1), p. 913, at
p. 918 (1929); and Heirs of Lebas de Courmont, ibid., vol. XIII (Sales
No. 64.V.3), p. 761, at p. 764 (1957).
494 See articles 43 and 45 and commentaries.
495 Walter Fletcher Smith (see footnote 493 above). In the Greek
Telephone Company case, the arbitral tribunal, while ordering restitution,
asserted that the responsible State could provide compensation
instead for “important State reasons” (see J. G. Wetter and
S. M. Schwebel, “Some little known cases on concessions”, BYBIL,
1964, vol. 40, p. 216, at p. 221.
496 Government of Kuwait v. American Independent Oil Company
(Aminoil) ILR, vol. 66, p. 519, at p. 533 (1982).
vidual arrested in its territory,497 the restitution of ships498
or other types of property,499 including documents, works
of art, share certificates, etc.500 The term “juridical restitution”
is sometimes used where restitution requires or
involves the modification of a legal situation either within
the legal system of the responsible State or in its legal
relations with the injured State. Such cases include the
revocation, annulment or amendment of a constitutional
or legislative provision enacted in violation of a rule of
international law,501 the rescinding or reconsideration of
an administrative or judicial measure unlawfully adopted
in respect of the person or property of a foreigner502 or
a requirement that steps be taken (to the extent allowed
by international law) for the termination of a treaty.503 In
some cases, both material and juridical restitution may be
involved.504 In others, an international court or tribunal
can, by determining the legal position with binding force
for the parties, award what amounts to restitution under
another form.505 The term “restitution” in article 35 thus
497 Examples of material restitution involving persons include the
“Trent” (1861) and “Florida” (1864) incidents, both involving the arrest
of individuals on board ships (Moore, Digest, vol. VII, pp. 768 and
1090–1091), and the United States Diplomatic and Consular Staff in
Tehran case in which ICJ ordered Iran to immediately release every
detained United States national (see footnote 59 above), pp. 44–45.
498 See, e.g., the “Giaffarieh” incident (1886) which originated
in the capture in the Red Sea by an Egyptian warship of four
merchant ships from Massawa under Italian registry, Società Italiana per
l’Organizzazione Internazionale–Consiglio Nazionale delle Ricerche,
La prassi italiana di diritto internazionale, 1st series (Dobbs Ferry,
NY., Oceana, 1970), vol. II, pp. 901–902.
499 For example, Temple of Preah Vihear, Merits, Judgment, I.C.J.
Reports 1962, p. 6, at pp. 36–37, where ICJ decided in favour of a
Cambodian claim which included restitution of certain objects removed
from the area and the temple by Thai authorities. See also the Hôtel
Métropole case, UNRIAA, vol. XIII (Sales No. 64.V.3), p. 219 (1950);
the Ottoz case, ibid., p. 240 (1950); and the Hénon case, ibid., p. 248
(1951).
500 In the Bužau-Nehoias,i Railway case, an arbitral tribunal provided
for the restitution to a German company of shares in a Romanian railway
company, UNRIAA, vol. III (Sales No. 1949.V.2), p. 1839 (1939).
501 For cases where the existence of a law itself amounts to a breach
of an international obligation, see paragraph (12) of the commentary
to article 12.
502 For example, the Martini case, UNRIAA, vol. II (Sales No. 1949.
V.1), p. 975 (1930).
503 In the Bryan-Chamorro Treaty case (Costa Rica v. Nicaragua),
the Central American Court of Justice decided that “the Government of
Nicaragua, by availing itself of measures possible under the authority
of international law, is under the obligation to re-establish and maintain
the legal status that existed prior to the Bryan-Chamorro Treaty between
the litigant republics in so far as relates to matters considered in
this action” (Anales de la Corte de Justicia Centroamericana (San José,
Costa Rica), vol. VI, Nos. 16–18 (December 1916–May 1917), p. 7);
and AJIL, vol. 11, No. 3 (1917), p. 674, at p. 696; see also page 683.
504 Thus, PCIJ held that Czechoslovakia was “bound to restore to the
Royal Hungarian Peter Pázmány University of Budapest the immovable
property claimed by it, freed from any measure of transfer, compulsory
administration, or sequestration, and in the condition in which it
was before the application of the measures in question” (Appeal from
a judgment of the Hungaro-Czechoslovak Mixed Arbitral Tribunal
(see footnote 481 above)).
505 In the Legal Status of Eastern Greenland case, PCIJ decided that
“the declaration of occupation promulgated by the Norwegian Government
on July 10th, 1931, and any steps taken in this respect by that
Government, constitute a violation of the existing legal situation and
are accordingly unlawful and invalid” (Judgment, 1933, P.C.I.J., Series
A/B, No. 53, p. 22, at p. 75). In the case of the Free Zones of Upper
Savoy and the District of Gex (see footnote 79 above), the Court decided
that France “must withdraw its customs line in accordance with
(Continued on next page.)
98	 Report of the International Law Commission on the work of its fifty-third session
has a broad meaning, encompassing any action that needs
to be taken by the responsible State to restore the situation
resulting from its internationally wrongful act.
(6)  What may be required in terms of restitution will often
depend on the content of the primary obligation which
has been breached. Restitution, as the first of the forms of
reparation, is of particular importance where the obligation
breached is of a continuing character, and even more
so where it arises under a peremptory norm of general
international law. In the case, for example, of unlawful
annexation of a State, the withdrawal of the occupying
State’s forces and the annulment of any decree of annexation
may be seen as involving cessation rather than restitution.506
Even so, ancillary measures (the return of persons
or property seized in the course of the invasion) will be
required as an aspect either of cessation or restitution.
(7)  The obligation to make restitution is not unlimited.
In particular, under article 35 restitution is required “provided
and to the extent that” it is neither materially impossible
nor wholly disproportionate. The phrase “provided
and to the extent that” makes it clear that restitution may
be only partially excluded, in which case the responsible
State will be obliged to make restitution to the extent that
this is neither impossible nor disproportionate.
(8)  Under article 35, subparagraph (a), restitution is not
required if it is “materially impossible”. This would apply
where property to be restored has been permanently lost
or destroyed, or has deteriorated to such an extent as to be
valueless. On the other hand, restitution is not impossible
merely on grounds of legal or practical difficulties, even
though the responsible State may have to make special efforts
to overcome these. Under article 32 the wrongdoing
State may not invoke the provisions of its internal law as
justification for the failure to provide full reparation, and
the mere fact of political or administrative obstacles to
restitution does not amount to impossibility.
(9)  Material impossibility is not limited to cases where
the object in question has been destroyed, but can cover
more complex situations. In the Forests of Central Rhodopia
case, the claimant was entitled to only a share in the
forestry operations and no claims had been brought by the
other participants. The forests were not in the same condition
as at the time of their wrongful taking, and detailed
inquiries would be necessary to determine their condition.
Since the taking, third parties had acquired rights to
them. For a combination of these reasons, restitution was
denied.507 The case supports a broad understanding of
the impossibility of granting restitution, but it concerned
questions of property rights within the legal system of the
responsible State.508 The position may be different where
(Footnote 505 continued.)
the provisions of the said treaties and instruments; and that this régime
must continue in force so long as it has not been modified by agreement
between the Parties” (p. 172). See also F. A. Mann, “The consequences
of an international wrong in international and municipal law”, BYBIL,
1976–1977, vol. 48, p. 1, at pp. 5–8.
506 See above, paragraph (8) of the commentary to article 30.
507 Forests of Central Rhodopia (see footnote 382 above), p. 1432.
508 For questions of restitution in the context of State contract arbitration,
see Texaco Overseas Petroleum Company and California Asiatic
Oil Company v. The Government of the Libyan Arab Republic (1977),
the rights and obligations in issue arise directly on the international
plane. In that context restitution plays a particularly
important role.
(10)  In certain cases, the position of third parties may
have to be taken into account in considering whether restitution
is materially possible. This was true in the Forests
of Central Rhodopia case. But whether the position of a
third party will preclude restitution will depend on the circumstances,
including whether the third party at the time
of entering into the transaction or assuming the disputed
rights was acting in good faith and without notice of the
claim to restitution.
(11)  A second exception, dealt with in article 35, subparagraph
(b), involves those cases where the benefit to
be gained from restitution is wholly disproportionate to its
cost to the responsible State. Specifically, restitution may
not be required if it would “involve a burden out of all
proportion to the benefit deriving from restitution instead
of compensation”. This applies only where there is a grave
disproportionality between the burden which restitution
would impose on the responsible State and the benefit
which would be gained, either by the injured State or by
any victim of the breach. It is thus based on considerations
of equity and reasonableness,509 although with a preference
for the position of the injured State in any case where
the balancing process does not indicate a clear preference
for compensation as compared with restitution. The balance
will invariably favour the injured State in any case
where the failure to provide restitution would jeopardize
its political independence or economic stability.
Article 36.  Compensation
1.  The State responsible for an internationally
wrongful act is under an obligation to compensate for
the damage caused thereby, insofar as such damage is
not made good by restitution.
2.  The compensation shall cover any financially
assessable damage including loss of profits insofar as
it is established.
Commentary
(1)  Article 36 deals with compensation for damage
caused by an internationally wrongful act, to the extent
that such damage is not made good by restitution. The
notion of “damage” is defined inclusively in article 31,
paragraph 2, as any damage whether material or moral.510
Article 36, paragraph 2, develops this definition by
specifying that compensation shall cover any financially
ILR, vol. 53, p. 389, at pp. 507–508, para. 109; BP Exploration Company
(Libya) Limited v. Government of the Libyan Arab Republic, ibid.,
p. 297, at p. 354 (1974); and Libyan American Oil Company (LIAMCO)
v. Government of the Libyan Arab Republic ibid., vol. 62, p. 141, at
p. 200 (1977).
509 See, e.g., J. H. W. Verzijl, International Law in Historical Perspective
(Leiden, Sijthoff, 1973), part VI, p. 744, and the position taken
by the Deutsche Gesellschaft für Völkerrecht (German International
Law Association) in Yearbook ... 1969, vol. II, p. 149.
510 See paragraphs (5) to (6) and (8) of the commentary to
article 31.
	 State responsibility	 99
assessable damage including loss of profits so far as this
is established in the given case. The qualification “financially
assessable” is intended to exclude compensation
for what is sometimes referred to as “moral damage” to
a State, i.e. the affront or injury caused by a violation of
rights not associated with actual damage to property or
persons: this is the subject matter of satisfaction, dealt
with in article 37.
(2)  Of the various forms of reparation, compensation is
perhaps the most commonly sought in international practice.
In the Gabˇcíkovo-Nagymaros Project case, ICJ declared:
“It is a well-established rule of international law
that an injured State is entitled to obtain compensation
from the State which has committed an internationally
wrongful act for the damage caused by it.”511 It is equally
well established that an international court or tribunal
which has jurisdiction with respect to a claim of State
responsibility has, as an aspect of that jurisdiction, the
power to award compensation for damage suffered.512
(3)  The relationship with restitution is clarified by the
final phrase of article 36, paragraph 1 (“insofar as such
damage is not made good by restitution”). Restitution, despite
its primacy as a matter of legal principle, is frequently
unavailable or inadequate. It may be partially or entirely
ruled out either on the basis of the exceptions expressed in
article 35, or because the injured State prefers compensation
or for other reasons. Even where restitution is made,
it may be insufficient to ensure full reparation. The role
of compensation is to fill in any gaps so as to ensure full
reparation for damage suffered.513 As the Umpire said in
the “Lusitania” case:
The fundamental concept of “damages” is ... reparation for a loss suffered;
a judicially ascertained compensation for wrong. The remedy
should be commensurate with the loss, so that the injured party may be
made whole.514
Likewise, the role of compensation was articulated by
PCIJ in the following terms:
Restitution in kind, or, if this is not possible, payment of a sum corresponding
to the value which a restitution in kind would bear; the award,
if need be, of damages for loss sustained which would not be covered
by restitution in kind or payment in place of it—such are the principles
which should serve to determine the amount of compensation due for
an act contrary to international law.515
511 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 81,
para. 152. See also the statement by PCIJ in Factory at Chorzów, Merits
(footnote 34 above), declaring that “[i]t is a principle of international
law that the reparation of a wrong may consist in an indemnity”
(p. 27).
512 Factory at Chorzów, Jurisdiction (see footnote 34 above); Fisheries
Jurisdiction (see footnote 432 above), pp. 203–205, paras. 71–76;
Military and Paramilitary Activities in and against Nicaragua 
(see footnote 36 above), p. 142.
513 Factory at Chorzów, Merits (see footnote 34 above), pp. 47–48.
514  UNRIAA, vol. VII (Sales No. 1956.V.5), p. 32, at p. 39 (1923).
515 Factory at Chorzów, Merits (see footnote 34 above), p. 47,
cited and applied, inter alia, by ITLOS in the case of the M/V “Saiga” 
(No. 2) (Saint Vincent and the Grenadines v. Guinea), Judgment, 
ITLOS Reports 1999 , p. 65, para. 170 (1999). See also Papamichalopoulos
and Others v. Greece (article 50), Eur. Court H.R., Series A, 
No. 330–B, para. 36 (1995); Velásquez Rodríguez (footnote 63 above),
pp. 26–27 and 30–31; and Tippetts, Abbett, McCarthy, Stratton v. TAMSAFFA
Consulting Engineers of Iran, Iran-U.S. C.T.R., vol. 6, p. 219, at
p. 225 (1984).
Entitlement to compensation for such losses is supported
by extensive case law, State practice and the writings of
jurists.
(4)  As compared with satisfaction, the function of compensation
is to address the actual losses incurred as a result
of the internationally wrongful act. In other words,
the function of article 36 is purely compensatory, as its
title indicates. Compensation corresponds to the financially
assessable damage suffered by the injured State or
its nationals. It is not concerned to punish the responsible
State, nor does compensation have an expressive or exemplary
character.516 Thus, compensation generally consists
of a monetary payment, though it may sometimes take the
form, as agreed, of other forms of value. It is true that
monetary payments may be called for by way of satisfaction
under article 37, but they perform a function distinct
from that of compensation. Monetary compensation is intended
to offset, as far as may be, the damage suffered by
the injured State as a result of the breach. Satisfaction is
concerned with non-material injury, specifically non-material
injury to the State, on which a monetary value can
be put only in a highly approximate and notional way.517
(5)  Consistently with other provisions of Part Two, article
36 is expressed as an obligation of the responsible
State to provide reparation for the consequences flowing
from the commission of an internationally wrongful act.518
The scope of this obligation is delimited by the phrase
“any financially assessable damage”, that is, any damage
which is capable of being evaluated in financial terms.
Financially assessable damage encompasses both damage
suffered by the State itself (to its property or personnel
or in respect of expenditures reasonably incurred to remedy
or mitigate damage flowing from an internationally
wrongful act) as well as damage suffered by nationals,
whether persons or companies, on whose behalf the State
is claiming within the framework of diplomatic protec-
tion.
(6)  In addition to ICJ, international tribunals dealing
with issues of compensation include the International
Tribunal for the Law of the Sea,519 the Iran-United
States Claims Tribunal,520 human rights courts and other
516 In the Velásquez Rodriguez, Compensatory Damages case, the
Inter-American Court of Human Rights held that international law did
not recognize the concept of punitive or exemplary damages (Series
C, No. 7 (1989)). See also Letelier and Moffitt, ILR, vol. 88, p. 727
(1992), concerning the assassination in Washington, D.C., by Chilean
agents of a former Chilean minister; the compromis excluded any award
of punitive damages, despite their availability under United States law.
On punitive damages, see also N. Jørgensen, “A reappraisal of punitive
damages in international law”, BYBIL, 1997, vol. 68, pp. 247–266;
and S. Wittich, “Awe of the gods and fear of the priests: punitive damages
in the law of State responsibility”, Austrian Review of International
and European Law, vol. 3, No. 1 (1998), p. 101.
517 See paragraph (3) of the commentary to article 37.
518 For the requirement of a sufficient causal link between the internationally
wrongful act and the damage, see paragraphs (11) to (13) of
the commentary to article 31.
519 For example, the M/V “Saiga” case (see footnote 515 above),
paras. 170–177.
520 The Iran-United States Claims Tribunal has developed a substantial
jurisprudence on questions of assessment of damage and the
valuation of expropriated property. For reviews of the tribunal’s juris(Continued
on next page.)
100	 Report of the International Law Commission on the work of its fifty-third session
bodies,521 and ICSID tribunals under the Convention on
the Settlement of Investment Disputes between States and
Nationals of other States.522 Other compensation claims
have been settled by agreement, normally on a without
prejudice basis, with the payment of substantial compensation
a term of the agreement.523 The rules and principles
developed by these bodies in assessing compensation can
be seen as manifestations of the general principle stated
in article 36.
(7)  As to the appropriate heads of compensable damage
and the principles of assessment to be applied in quantification,
these will vary, depending upon the content of particular
primary obligations, an evaluation of the respective
behaviour of the parties and, more generally, a concern to
reach an equitable and acceptable outcome.524 The following
examples illustrate the types of damage that may
be compensable and the methods of quantification that
may be employed.
(8)  Damage to the State as such might arise out of the
shooting down of its aircraft or the sinking of its ships,
attacks on its diplomatic premises and personnel, damage
caused to other public property, the costs incurred in
responding to pollution damage, or incidental damage
arising, for example, out of the need to pay pensions and
medical expenses for officials injured as the result of a
wrongful act. Such a list cannot be comprehensive and
the categories of compensable injuries suffered by States
are not closed.
(9)  In the Corfu Channel case, the United Kingdom
sought compensation in respect of three heads of damage:
replacement of the destroyer Saumarez, which be(Footnote
520 continued.)
prudence on these subjects, see, inter alia, Aldrich, op. cit. (footnote
357 above), chaps. 5–6 and 12; C. N. Brower and J. D. Brueschke, The
Iran-United States Claims Tribunal (The Hague, Martinus Nijhoff,
1998), chaps. 14–18; M. Pellonpää, “Compensable claims before the
Tribunal: expropriation claims”, The Iran-United States Claims Tribunal:
Its Contribution to the Law of State Responsibility, R. B. Lillich
and D. B. MaGraw, eds. (Irvington-on-Hudson, Transnational, 1998),
pp. 185–266; and D. P. Stewart, “Compensation and valuation issues”,
ibid., pp. 325–385.
521 For a review of the practice of such bodies in awarding compensation,
see D. Shelton, Remedies in International Human Rights Law
(Oxford University Press, 1999), pp. 214–279.
522 ICSID tribunals have jurisdiction to award damages or other remedies
in cases concerning investments arising between States parties and
nationals. Some of these claims involve direct recourse to international
law as a basis of claim. See, e.g., Asian Agricultural Products Limited
v. Republic of Sri Lanka, ICSID Reports (Cambridge University Press,
1997), vol. 4, p. 245 (1990).
523 See, e.g., Certain Phosphate Lands in Nauru, Preliminary Objections
(footnote 230 above), and for the Court’s order of discontinuance
following the settlement, ibid., Order (footnote 232 above); Passage
through the Great Belt (Finland v. Denmark), Order of 10 September
1992, I.C.J. Reports 1992, p. 348 (order of discontinuance following
settlement); and Aerial Incident of 3 July 1988 (Islamic Republic of
Iran v. United States of America), Order of 22 February 1996, I.C.J.
Reports 1996, p. 9 (order of discontinuance following settlement).
524 See Aldrich, op. cit. (footnote 357 above), p. 242. See also
Graefrath, “Responsibility and damages caused: relationship between
responsibility and damages” (footnote 454 above), p. 101;
L. Reitzer, La réparation comme conséquence de l’acte illicite en droit
international (Paris, Sirey, 1938); Gray, op. cit. (footnote 432 above),
pp. 33–34; J. Personnaz, La réparation du préjudice en droit international
public (Paris, 1939); and M. Iovane, La riparazione nella teoria
e nella prassi dell’illecito internazionale (Milan, Giuffrè, 1990).
came a total loss, the damage sustained by the destroyer
“Volage”, and the damage resulting from the deaths and
injuries of naval personnel. ICJ entrusted the assessment
to expert inquiry. In respect of the destroyer Saumarez, the
Court found that “the true measure of compensation” was
“the replacement cost of the [destroyer] at the time of its
loss” and held that the amount of compensation claimed
by the British Government (£ 700,087) was justified.
For the damage to the destroyer “Volage”, the experts had
reached a slightly lower figure than the £ 93,812 claimed
by the United Kingdom, “explained by the necessarily approximate
nature of the valuation, especially as regards
stores and equipment”. In addition to the amounts awarded
for the damage to the two destroyers, the Court upheld the
United Kingdom’s claim for £ 50,048 representing “the
cost of pensions and other grants made by it to victims or
their dependants, and for costs of administration, medical
treatment, etc”.525
(10)  In the M/V “Saiga” (No. 2) case, Saint Vincent and
the Grenadines sought compensation from Guinea following
the wrongful arrest and detention of a vessel registered
in Saint Vincent and the Grenadines, the “Saiga”, and its
crew. ITLOS awarded compensation of US$ 2,123,357
with interest. The heads of damage compensated included,
inter alia, damage to the vessel, including costs
of repair, losses suffered with respect to charter hire of
the vessel, costs related to the detention of the vessel, and
damages for the detention of the captain, members of the
crew and others on board the vessel. Saint Vincent and the
Grenadines had claimed compensation for the violation
of its rights in respect of ships flying its flag occasioned
by the arrest and detention of the “Saiga”; however, the
tribunal considered that its declaration that Guinea acted
wrongfully in arresting the vessel in the circumstances,
and in using excessive force, constituted adequate reparation.526
Claims regarding the loss of registration revenue
due to the illegal arrest of the vessel and for the expenses
resulting from the time lost by officials in dealing with
the arrest and detention of the ship and its crew were also
unsuccessful. In respect of the former, the tribunal held
that Saint Vincent and the Grenadines failed to produce
supporting evidence. In respect of the latter, the tribunal
considered that such expenses were not recoverable since
they were incurred in the exercise of the normal functions
of a flag State.527
(11)  In a number of cases, payments have been directly
negotiated between injured and injuring States following
wrongful attacks on ships causing damage or sinking
of the vessel, and in some cases, loss of life and injury
among the crew.528 Similar payments have been negotiated
where damage is caused to aircraft of a State, such as
525 Corfu Channel, Assessment of Amount of Compensation (see
footnote 473 above), p. 249.
526  The M/V “Saiga” case (see footnote 515 above), para. 176.
527 Ibid., para. 177.
528 See the payment by Cuba to the Bahamas for the sinking by Cuban
aircraft on the high seas of a Bahamian vessel, with loss of life
among the crew (RGDIP, vol. 85 (1981), p. 540), the payment of compensation
by Israel for an attack in 1967 on the USS Liberty, with loss
of life and injury among the crew (ibid., p. 562), and the payment by
Iraq of US$ 27 million for the 37 deaths which occurred in May 1987
when Iraqi aircraft severely damaged the USS Stark (AJIL, vol. 83,
No. 3 (July 1989), p. 561).
	 State responsibility	 101
the “full and final settlement” agreed between the Islamic
Republic of Iran and the United States following a dispute
over the destruction of an Iranian aircraft and the killing
of its 290 passengers and crew.529
(12)  Agreements for the payment of compensation are
also frequently negotiated by States following attacks on
diplomatic premises, whether in relation to damage to
the embassy itself530 or injury to its personnel.531 Damage
caused to other public property, such as roads and infrastructure,
has also been the subject of compensation
claims.532 In many cases, these payments have been made
on an ex gratia or a without prejudice basis, without any
admission of responsibility.533
(13)  Another situation in which States may seek compensation
for damage suffered by the State as such is
where costs are incurred in responding to pollution damage.
Following the crash of the Soviet Cosmos 954 satellite
on Canadian territory in January 1978, Canada’s claim for
compensation for expenses incurred in locating, recovering,
removing and testing radioactive debris and cleaning
up affected areas was based “jointly and separately on (a)
the relevant international agreements … and (b) general
principles of international law”.534 Canada asserted that
it was applying “the relevant criteria established by general
principles of international law according to which fair
compensation is to be paid, by including in its claim only
those costs that are reasonable, proximately caused by the
intrusion of the satellite and deposit of debris and capable
of being calculated with a reasonable degree of certainty”.535
The claim was eventually settled in April 1981
when the parties agreed on an ex gratia payment of Can$
3 million (about 50 per cent of the amount claimed).536
529 Aerial Incident of 3 July 1988 (see footnote 523 above) (order
of discontinuance following settlement). For the settlement agreement
itself, see the General Agreement on the Settlement of Certain International
Court of Justice and Tribunal Cases (1996), attached to the Joint
Request for Arbitral Award on Agreed Terms, Iran-U.S. C.T.R., vol. 32,
pp. 213–216 (1996).
530 See, e.g., the Exchange of Notes between the Government of the
United Kingdom of Great Britain and Northern Ireland and the Government
of the Republic of Indonesia concerning the losses incurred by the
Government of the United Kingdom and by British nationals as a result
of the disturbances in Indonesia in September 1963 (1 December 1966)
for the payment by Indonesia of compensation for, inter alia, damage to
the British Embassy during mob violence (Treaty Series No. 34 (1967))
(London, HM Stationery Office) and the payment by Pakistan to the
United States of compensation for the sacking of the United States
Embassy in Islamabad in 1979 (RGDIP, vol. 85 (1981), p. 880).
531 See, e.g., Claim of Consul Henry R. Myers (United States v. Salvador)
(1890), Papers relating to the Foreign Relations of the United
States, pp. 64–65; (1892), pp. 24–44 and 49–51; (1893), pp. 174–179,
181–182 and 184; and Whiteman, Damages in International Law (footnote
347 above), pp. 80–81.
532 For examples, see Whiteman, Damages in International Law
(footnote 347 above), p. 81.
533 See, e.g., the United States-China agreement providing for an ex
gratia payment of US$ 4.5 million, to be given to the families of those
killed and to those injured in the bombing of the Chinese Embassy in
Belgrade on 7 May 1999, AJIL, vol. 94, No. 1 (January 2000), p. 127.
534 The claim of Canada against the Union of Soviet Socialist Republics
for damage caused by Cosmos 954, 23 January 1979 (see footnote
459 above), pp. 899 and 905.
535 Ibid., p. 907.
536 Protocol between Canada and the Union of Soviet Socialist Republics
in respect of the claim for damages caused by the Satellite
“Cosmos 954” (Moscow, 2 April 1981), United Nations, Treaty Series,
(14)  Compensation claims for pollution costs have been
dealt with by UNCC in the context of assessing Iraq’s liability
under international law “for any direct loss, damage—including
environmental damage and the depletion
of natural resources … as a result of its unlawful invasion
and occupation of Kuwait”.537 The UNCC Governing
Council decision 7 specifies various heads of damage encompassed
by “environmental damage and the depletion
of natural resources”.538
(15)  In cases where compensation has been awarded
or agreed following an internationally wrongful act that
causes or threatens environmental damage, payments
have been directed to reimbursing the injured State for
expenses reasonably incurred in preventing or remedying
pollution, or to providing compensation for a reduction in
the value of polluted property.539 However, environmental
damage will often extend beyond that which can be
readily quantified in terms of clean-up costs or property
devaluation. Damage to such environmental values (biodiversity,
amenity, etc.—sometimes referred to as “nonuse
values”) is, as a matter of principle, no less real and
compensable than damage to property, though it may be
difficult to quantify.
(16)  Within the field of diplomatic protection, a good
deal of guidance is available as to appropriate compensation
standards and methods of valuation, especially as
concerns personal injury and takings of, or damage to,
tangible property. It is well established that a State may
seek compensation in respect of personal injuries suffered
by its officials or nationals, over and above any direct
injury it may itself have suffered in relation to the
same event. Compensable personal injury encompasses
not only associated material losses, such as loss of earnings
and earning capacity, medical expenses and the like,
but also non-material damage suffered by the individual
(sometimes, though not universally, referred to as “moral
damage” in national legal systems). Non-material damage
is generally understood to encompass loss of loved ones,
pain and suffering as well as the affront to sensibilities associated
with an intrusion on the person, home or private
life. No less than material injury sustained by the injured
State, non-material damage is financially assessable and
may be the subject of a claim of compensation, as stressed
in the “Lusitania” case.540 The umpire considered that
international law provides compensation for mental
vol. 1470, No. 24934, p. 269. See also ILM, vol. 20, No. 3 (May 1981),
p. 689.
537 Security Council resolution 687 (1991), para. 16 (see footnote
461 above).
538 Decision 7 of 16 March 1992, Criteria for additional categories of
claims (S/AC.26/1991/7/Rev.1), para 35.
539 See the decision of the arbitral tribunal in the Trail Smelter case
(footnote 253 above), p. 1911, which provided compensation to the
United States for damage to land and property caused by sulphur dioxide
emissions from a smelter across the border in Canada. Compensation
was assessed on the basis of the reduction in value of the affected
land.
540 See footnote 514 above. International tribunals have frequently
granted pecuniary compensation for moral injury to private parties.
For example, the Chevreau case (see footnote 133 above) (English
translation in AJIL, vol. 27, No. 1 (January 1933), p. 153); the Gage
case, UNRIAA, vol. IX (Sales No. 59.V.5), p. 226 (1903); the Di Caro
case, ibid., vol. X (Sales No. 60.V.4), p. 597 (1903); and the Heirs of
Jean Maninat case, ibid., p. 55 (1903).
102	 Report of the International Law Commission on the work of its fifty-third session
suffering, injury to feelings, humiliation, shame, degradation,
loss of social position or injury to credit and reputation,
such injuries being “very real, and the mere fact that
they are difficult to measure or estimate by money standards
makes them none the less real and affords no reason
why the injured person should not be compensated …”.541
(17)  International courts and tribunals have undertaken
the assessment of compensation for personal injury on
numerous occasions. For example, in the M/V “Saiga”
case, 542 the tribunal held that Saint Vincent and the Grenadines’
entitlement to compensation included damages
for injury to the crew, their unlawful arrest, detention and
other forms of ill-treatment.
(18)  Historically, compensation for personal injury suffered
by nationals or officials of a State arose mainly in
the context of mixed claims commissions dealing with
State responsibility for injury to aliens. Claims commissions
awarded compensation for personal injury both in
cases of wrongful death and deprivation of liberty. Where
claims were made in respect of wrongful death, damages
were generally based on an evaluation of the losses of the
surviving heirs or successors, calculated in accordance
with the well-known formula of Umpire Parker in the
“Lusitania” case:
Estimate the amounts (a) which the decedent, had he not been killed,
would probably have contributed to the claimant, add thereto (b) the
pecuniary value to such claimant of the deceased’s personal services
in claimant’s care, education, or supervision, and also add (c) reasonable
compensation for such mental suffering or shock, if any, caused
by the violent severing of family ties, as claimant may actually have
sustained by reason of such death. The sum of these estimates reduced
to its present cash value, will generally represent the loss sustained by
claimant.543
In cases of deprivation of liberty, arbitrators sometimes
awarded a set amount for each day spent in detention.544
Awards were often increased when abusive conditions of
confinement accompanied the wrongful arrest and imprisonment,
resulting in particularly serious physical or
psychological injury.545
(19)  Compensation for personal injury has also been
dealt with by human rights bodies, in particular the European
Court of Human Rights and the Inter-American
Court of Human Rights. Awards of compensation encompass
material losses (loss of earnings, pensions, medical
expenses, etc.) and non-material damage (pain and suffering,
mental anguish, humiliation, loss of enjoyment of
life and loss of companionship or consortium), the latter
usually quantified on the basis of an equitable assessment.
Hitherto, amounts of compensation or damages
awarded or recommended by these bodies have been modest.546
Nonetheless, the decisions of human rights bodies
541 “Lusitania” (see footnote 514 above), p. 40.
542 See footnote 515 above.
543 “Lusitania” (see footnote 514 above), p. 35.
544 For example, the “Topaze” case, UNRIAA, vol. IX (Sales
No. 59.V.5), p. 387, at p. 389 (1903); and the Faulkner case, ibid.,
vol. IV (Sales No. 1951.V.1), p. 67, at p. 71 (1926).
545 For example, the William McNeil case, ibid., vol. V (Sales
No. 1952.V.3), p. 164, at p. 168 (1931).
546 See the review by Shelton, op. cit. (footnote 521 above),
chaps. 8–9; A. Randelzhofer and C. Tomuschat, eds., State Responsibility
and the Individual: Reparation in Instances of Grave Violations
on compensation draw on principles of reparation under
general international law.547
(20)  In addition to a large number of lump-sum compensation
agreements covering multiple claims,548 property
claims of nationals arising out of an internationally
wrongful act have been adjudicated by a wide range of ad
hoc and standing tribunals and commissions, with reported
cases spanning two centuries. Given the diversity of
adjudicating bodies, the awards exhibit considerable variability.549
Nevertheless, they provide useful principles to
guide the determination of compensation under this head
of damage.
(21)  The reference point for valuation purposes is the
loss suffered by the claimant whose property rights have
been infringed. This loss is usually assessed by reference
to specific heads of damage relating to (i) compensation
for capital value; (ii) compensation for loss of profits; and
(iii) incidental expenses.
(22)  Compensation reflecting the capital value of property
taken or destroyed as the result of an internationally
wrongful act is generally assessed on the basis of the “fair
market value” of the property lost.550 The method used to
of Human Rights (The Hague, Martinus Nijhoff, 1999); and R. Pisillo
Mazzeschi, “La riparazione per violazione dei diritti umani nel diritto
internazionale e nella Convenzione europea”, La Comunità internazionale,
vol. 53, No. 2 (1998), p. 215.
547 See, e.g., the decision of the Inter-American Court of Human
Rights in the Velásquez Rodríguez case (footnote 63 above), pp. 26–27
and 30–31. Cf. Papamichalopoulos (footnote 515 above).
548 See, e.g., R. B. Lillich and B. H. Weston, International Claims:
Their Settlement by Lump Sum Agreements (Charlottesville, University
Press of Virginia, 1975); and B. H. Weston, R. B. Lillich and D. J.
Bederman, International Claims: Their Settlement by Lump Sum Agreements,
1975–1995 (Ardsley, N.Y., Transnational, 1999).
549 Controversy has persisted in relation to expropriation cases,
particularly over standards of compensation applicable in the light of
the distinction between lawful expropriation of property by the State
on the one hand, and unlawful takings on the other, a distinction clearly
drawn by PCIJ in Factory at Chorzów, Merits (footnote 34 above), p. 47.
In a number of cases, tribunals have employed the distinction to rule in
favour of compensation for lost profits in cases of unlawful takings (see,
e.g., the observations of the arbitrator in Libyan American Oil Company
(LIAMCO) (footnote 508 above), pp. 202–203; and also the Aminoil
arbitration (footnote 496 above), p. 600, para. 138; and Amoco International
Finance Corporation v. The Government of the Islamic Republic
of Iran, Iran-U.S. C.T.R., vol. 15, p. 189, at p. 246, para. 192 (1987)).
Not all cases, however, have drawn a distinction between the applicable
compensation principles based on the lawfulness or unlawfulness of the
taking. See, e.g., the decision of the Iran-United States Claims Tribunal
in Phillips Petroleum (footnote 164 above), p. 122, para. 110. See also
Starrett Housing Corporation v. Government of the Islamic Republic of
Iran, Iran‑U.S. C.T.R., vol. 16, p. 112 (1987), where the tribunal made
no distinction in terms of the lawfulness of the taking and its award
included compensation for lost profits.
550 See American International Group, Inc. v. The Islamic Republic
of Iran, which stated that, under general international law, “the valuation
should be made on the basis of the fair market value of the shares”, IranU.S.
C.T.R., vol. 4, p. 96, at p. 106 (1983). In Starrett Housing Corporation
(see footnote 549 above), the tribunal accepted its expert’s concept
of fair market value “as the price that a willing buyer would pay to a
willing seller in circumstances in which each had good information,
each desired to maximize his financial gain, and neither was under
duress or threat” (p. 201). See also the Guidelines on the Treatment
of Foreign Direct Investment, which state in paragraph 3 of part IV
that compensation “will be deemed ‘adequate’ if it is based on the fair
market value of the taken asset as such value is determined immediately
before the time at which the taking occurred or the decision to
take the asset became publicly known”, World Bank, Legal Framework
	 State responsibility	 103
assess “fair market value”, however, depends on the nature
of the asset concerned. Where the property in question or
comparable property is freely traded on an open market,
value is more readily determined. In such cases, the choice
and application of asset-based valuation methods based
on market data and the physical properties of the assets is
relatively unproblematic, apart from evidentiary difficulties
associated with long outstanding claims.551 Where the
property interests in question are unique or unusual, for
example, art works or other cultural property,552 or are
not the subject of frequent or recent market transactions,
the determination of value is more difficult. This may be
true, for example, in respect of certain business entities in
the nature of a going concern, especially if shares are not
regularly traded.553
(23)  Decisions of various ad hoc tribunals since 1945
have been dominated by claims in respect of nationalized
business entities. The preferred approach in these cases
has been to examine the assets of the business, making
allowance for goodwill and profitability, as appropriate.
This method has the advantage of grounding compensation
as much as possible in some objective assessment of
value linked to the tangible asset backing of the business.
The value of goodwill and other indicators of profitability
may be uncertain, unless derived from information provided
by a recent sale or acceptable arms-length offer.Yet,
for profitable business entities where the whole is greater
than the sum of the parts, compensation would be incomplete
without paying due regard to such factors.554
for the Treatment of Foreign Investment (Washington, D.C., 1992),
vol. II, p. 41. Likewise, according to article 13, paragraph 1, of the
Energy Charter Treaty, compensation for expropriation “shall amount
to the fair market value of the Investment expropriated at the time
immediately before the Expropriation”.
551 Particularly in the case of lump-sum settlements, agreements
have been concluded decades after the claims arose. See, e.g., the
Agreement between the Government of the United Kingdom of Great
Britain and Northern Ireland and the Government of the Union of Soviet
Socialist Republics concerning the Settlement of Mutual Financial
and Property Claims arising before 1939 of 15 July 1986 (Treaty Series,
No. 65 (1986)) (London, HM Stationery Office) concerning claims dating
back to 1917 and the Agreement between the Government of the
United Kingdom of Great Britain and Northern Ireland and the Government
of the People’s Republic of China concerning the Settlement of
Mutual Historical Property Claims of 5 June 1987 (Treaty Series,
No. 37 (1987), ibid.) in respect of claims arising in 1949. In such cases,
the choice of valuation method was sometimes determined by availability
of evidence.
552 See Report and recommendations made by the panel of Commissioners
concerning part two of the first instalment of individual claims
for damages above US$ 100 000 (category “D” claims), 12 March 1998
(S/AC.26/1998/3), paras. 48–49, where UNCC considered a compensation
claim in relation to the taking of the claimant’s Islamic art collection
by Iraqi military personnel.  
553 Where share prices provide good evidence of value, they may
be utilized, as in INA Corporation v. The Government of the Islamic 
Republic of Iran, Iran-U.S. C.T.R., vol. 8, p. 373 (1985).
554 Early claims recognized that even where a taking of property was
lawful, compensation for a going concern called for something more
than the value of the property elements of the business. The AmericanMexican
Claims Commission, in rejecting a claim for lost profits in
the case of a lawful taking, stated that payment for property elements
would be “augmented by the existence of those elements which constitute
a going concern”: Wells Fargo and Company (Decision No. 22–B)
(1926), American-Mexican Claims Commission (Washington, D.C.,
United States Government Printing Office, 1948), p. 153 (1926). See
also decision No. 9 of the UNCC Governing Council in “Propositions
and conclusions on compensation for business losses: types of damages
and their valuation” (S/AC.26/1992/9), para. 16.
(24)  An alternative valuation method for capital loss is
the determination of net book value, i.e. the difference between
the total assets of the business and total liabilities
as shown on its books. Its advantages are that the figures
can be determined by reference to market costs, they are
normally drawn from a contemporaneous record, and they
are based on data generated for some other purpose than
supporting the claim. Accordingly, net book value (or
some variant of this method) has been employed to assess
the value of businesses. The limitations of the method lie
in the reliance on historical figures, the use of accounting
principles which tend to undervalue assets, especially
in periods of inflation, and the fact that the purpose for
which the figures were produced does not take account of
the compensation context and any rules specific to it. The
balance sheet may contain an entry for goodwill, but the
reliability of such figures depends upon their proximity to
the moment of an actual sale.
(25)  In cases where a business is not a going concern,555
so-called “break-up”, “liquidation” or “dissolution” value
is generally employed. In such cases, no provision is made
for value over and above the market value of the individual
assets. Techniques have been developed to construct,
in the absence of actual transactions, hypothetical values
representing what a willing buyer and willing seller might
agree.556
(26)  Since 1945, valuation techniques have been developed
to factor in different elements of risk and probability.557
The discounted cash flow (DCF) method has gained
some favour, especially in the context of calculations involving
income over a limited duration, as in the case of
wasting assets. Although developed as a tool for assessing
commercial value, it can also be useful in the context of
calculating value for compensation purposes.558 But difficulties
can arise in the application of the DCF method to
establish capital value in the compensation context. The
method analyses a wide range of inherently speculative
elements, some of which have a significant impact upon
the outcome (e.g. discount rates, currency fluctuations,
inflation figures, commodity prices, interest rates and
other commercial risks). This has led tribunals to adopt a
555 For an example of a business found not to be a going concern, see
Phelps Dodge Corp. v. The Islamic Republic of Iran, Iran-U.S. C.T.R.,
vol. 10, p. 121 (1986), where the enterprise had not been established
long enough to demonstrate its viability. In SEDCO, Inc. v. National
Iranian Oil Co., the claimant sought dissolution value only, ibid.,
p. 180 (1986).
556 The hypothetical nature of the result is discussed in Amoco International
Finance Corporation (see footnote 549 above), at pp. 256–
257, paras. 220–223.
557 See, for example, the detailed methodology developed by UNCC
for assessing Kuwaiti corporate claims (report and recommendations
made by the panel of Commissioners concerning the first instalment
of “E4” claims, 19 March 1999 (S/AC.26/1999/4), paras. 32–62) and
claims filed on behalf of non‑Kuwaiti corporations and other business
entities, excluding oil sector, construction/engineering and export guarantee
claims (report and recommendations made by the panel of Commissioners
concerning the third instalment of “E2” claims, 9 December
1999 (S/AC.26/1999/22)).
558 The use of the discounted cash flow method to assess capital
value was analysed in some detail in Amoco International Finance
Corporation (see footnote 549 above); Starrett Housing Corporation
(ibid.); Phillips Petroleum Company Iran (see footnote 164 above); and
Ebrahimi (Shahin Shaine) v. Islamic Republic of Iran, Iran-U.S. C.T.R.,
vol. 30, p. 170 (1994).
104	 Report of the International Law Commission on the work of its fifty-third session
cautious approach to the use of the method. Hence, although
income-based methods have been accepted in
principle, there has been a decided preference for assetbased
methods.559 A particular concern is the risk of double-counting
which arises from the relationship between
the capital value of an enterprise and its contractually
based profits.560
(27)  Paragraph 2 of article 36 recognizes that in certain
cases compensation for loss of profits may be appropriate.
International tribunals have included an award for
loss of profits in assessing compensation: for example,
the decisions in the Cape Horn Pigeon case561 and Sapphire
International Petroleums Ltd. v. National Iranian
Oil Company.562 Loss of profits played a role in the Factory
at Chorzów case itself, PCIJ deciding that the injured
party should receive the value of property by way
of damages not as it stood at the time of expropriation
but at the time of indemnification.563 Awards for loss
of profits have also been made in respect of contractbased
lost profits in Libyan American Oil Company
(LIAMCO)564 and in some ICSID arbitrations.565
Nevertheless, lost profits have not been as commonly
awarded in practice as compensation for accrued losses.
Tribunals have been reluctant to provide compensation
for claims with inherently speculative elements.566 When
559 See, e.g., Amoco (footnote 549 above); Starrett Housing Corporation
(ibid.); and Phillips Petroleum Company Iran (footnote 164 above).
In the context of claims for lost profits, there is a corresponding preference
for claims to be based on past performance rather than forecasts.
For example, the UNCC guidelines on valuation of business losses in
decision 9 (see footnote 554 above) state: “The method of a valuation
should therefore be one that focuses on past performance rather than on
forecasts and projections into the future” (para. 19).
560 See, e.g., Ebrahimi (footnote 558 above), p. 227, para. 159.
561 Navires (see footnote 222 above) (Cape Horn Pigeon case),
p. 63 (1902) (including compensation for lost profits resulting from the
seizure of an American whaler). Similar conclusions were reached in
the Delagoa Bay Railway case, Martens, op. cit. (footnote 441 above),
vol. XXX, p. 329 (1900); Moore, History and Digest, vol. II, p. 1865
(1900); the William Lee case (footnote 139 above), pp. 3405–3407;
and the Yuille Shortridge and Co. case (Great Britain v. Portugal),
Lapradelle–Politis, op. cit. (ibid.), vol. II, p. 78 (1861). Contrast the decisions
in the Canada case (United States of America v. Brazil), Moore,
History and Digest, vol. II, p. 1733 (1870) and the Lacaze case (footnote
139 above).
562 ILR, vol. 35, p. 136, at pp. 187 and 189 (1963).
563  Factory at Chorzów, Merits (see footnote 34 above), pp. 47–48
and 53.
564 Libyan American Oil Company (LIAMCO) (see footnote 508
above), p. 140.
565 See, e.g., Amco Asia Corporation and Others v. The Republic
of Indonesia, First Arbitration (1984); Annulment (1986); Resubmitted
case (1990), ICSID Reports (Cambridge, Grotius, 1993), vol. 1,
p. 377; and AGIP SpA v. the Government of the People’s Republic of the
Congo, ibid., p. 306 (1979).
566 According to the arbitrator in the Shufeldt case (see footnote 87
above), “the lucrum cessans must be the direct fruit of the contract
and not too remote or speculative” (p. 1099). See also Amco Asia 
Corporation and Others (footnote 565 above), where it was stated that
“non-speculative profits” were recoverable (p. 612, para. 178). UNCC
has also stressed the requirement for claimants to provide “clear and
convincing evidence of ongoing and expected profitability” (see report
and recommendations made by the panel of Commissioners
concerning the first instalment of “E3” claims, 17 December 1998
(S/AC.26/1998/13), para. 147). In assessing claims for lost profits on
construction contracts, Panels have generally required that the claimant’s
calculation take into account the risk inherent in the project (ibid.,
para. 157; report and recommendations made by the panel of Commissioners
concerning the fourth instalment of “E3” claims, 30 September
1999 (S/AC.26/1999/14), para. 126).
compared with tangible assets, profits (and intangible
assets which are income-based) are relatively vulnerable
to commercial and political risks, and increasingly
so the further into the future projections are made. In
cases where lost future profits have been awarded, it has
been where an anticipated income stream has attained
sufficient attributes to be considered a legally protected
interest of sufficient certainty to be compensable.567 This
has normally been achieved by virtue of contractual
arrangements or, in some cases, a well-established history
of dealings.568
(28)  Three categories of loss of profits may be distinguished:
first, lost profits from income-producing property
during a period when there has been no interference
with title as distinct from temporary loss of use; secondly,
lost profits from income-producing property between the
date of taking of title and adjudication;569 and thirdly, lost
future profits in which profits anticipated after the date of
adjudication are awarded.570
(29)  The first category involves claims for loss of profits
due to the temporary loss of use and enjoyment of the
income-producing asset.571 In these cases there is no interference
with title and hence in the relevant period the
loss compensated is the income to which the claimant was
entitled by virtue of undisturbed ownership.
(30)  The second category of claims relates to the unlawful
taking of income-producing property. In such cases
567 In considering claims for future profits, the UNCC panel dealing
with the fourth instalment of “E3” claims expressed the view that in
order for such claims to warrant a recommendation, “it is necessary to
demonstrate by sufficient documentary and other appropriate evidence
a history of successful (i.e. profitable) operation, and a state of affairs
which warrants the conclusion that the hypothesis that there would have
been future profitable contracts is well founded” (S/AC.26/1999/14),
para. 140 (see footnote 566 above).
568 According to Whiteman, “in order to be allowable, prospective
profits must not be too speculative, contingent, uncertain, and the like.
There must be proof that they were reasonably anticipated; and that the
profits anticipated were probable and not merely possible” (Damages in
International Law (Washington, D.C., United States Government Printing
Office, 1943), vol. III, p. 1837).
569 This is most commonly associated with the deprivation of property,
as opposed to wrongful termination of a contract or concession.
If restitution were awarded, the award of lost profits would be analogous
to cases of temporary dispossession. If restitution is not awarded, as in
the Factory at Chorzów, Merits (see footnote 34 above) and Norwegian
Shipowners’ Claims (footnote 87 above), lost profits may be awarded
up to the time when compensation is made available as a substitute for
restitution.
570 Awards of lost future profits have been made in the context of a
contractually protected income stream, as in Amco Asia Corporation
and Others v. The Republic of Indonesia, First Arbitration; Annulment;
Resubmitted case (see footnote 565 above), rather than on the basis
of the taking of income-producing property. In the UNCC report and
recommendations on the second instalment of “E2” claims, dealing
with reduced profits, the panel found that losses arising from a decline
in business were compensable even though tangible property was not
affected and the businesses continued to operate throughout the relevant
period (S/AC.26/1999/6, para. 76).
571 Many of the early cases concern vessels seized and detained.
In the “Montijo”, an American vessel seized in Panama, the Umpire
allowed a sum of money per day for loss of the use of the vessel
(see footnote 117 above). In the “Betsey”, compensation was awarded
not only for the value of the cargo seized and detained, but also for
demurrage for the period representing loss of use: Moore, International
Adjudications (New York, Oxford University Press, 1933) vol. V,
p. 47, at p. 113.
	 State responsibility	 105
lost profits have been awarded for the period up to the
time of adjudication. In the Factory at Chorzów case,572
this took the form of re-invested income, representing
profits from the time of taking to the time of adjudication.
In the Norwegian Shipowners’ Claims case,573 lost profits
were similarly not awarded for any period beyond the date
of adjudication. Once the capital value of income-producing
property has been restored through the mechanism of
compensation, funds paid by way of compensation can
once again be invested to re-establish an income stream.
Although the rationale for the award of lost profits in
these cases is less clearly articulated, it may be attributed
to a recognition of the claimant’s continuing beneficial
interest in the property up to the moment when potential
restitution is converted to a compensation payment.574
(31)  The third category of claims for loss of profits arises
in the context of concessions and other contractually protected
interests. Again, in such cases, lost future income
has sometimes been awarded.575 In the case of contracts,
it is the future income stream which is compensated, up to
the time when the legal recognition of entitlement ends. In
some contracts this is immediate, e.g. where the contract
is determinable at the instance of the State,576 or where
some other basis for contractual termination exists. Or it
may arise from some future date dictated by the terms of
the contract itself.
(32)  In other cases, lost profits have been excluded on
the basis that they were not sufficiently established as a legally
protected interest. In the Oscar Chinn case577 a monopoly
was not accorded the status of an acquired right. In
the Asian Agricultural Products case,578 a claim for lost
profits by a newly established business was rejected for
lack of evidence of established earnings. Claims for lost
profits are also subject to the usual range of limitations
on the recovery of damages, such as causation, remoteness,
evidentiary requirements and accounting principles,
572 Factory at Chorzów, Merits (see footnote 34 above).
573 Norwegian Shipowners’ Claims (see footnote 87 above).
574 For the approach of UNCC in dealing with loss of profits claims
associated with the destruction of businesses following the Iraqi invasion
of Kuwait, see S/AC.26/1999/4 (footnote 557 above), paras. 184–
187.
575 In some cases, lost profits were not awarded beyond the date of
adjudication, though for reasons unrelated to the nature of the incomeproducing
property. See, e.g., Robert H. May (United States v. Guatemala),
1900 For. Rel. 648; and Whiteman, Damages in International
Law, vol. III (footnote 568 above), pp. 1704 and 1860, where the concession
had expired. In other cases, circumstances giving rise to force
majeure had the effect of suspending contractual obligations: see, e.g.,
Gould Marketing, Inc. v. Ministry of Defence of the Islamic Republic
of Iran, Iran-U.S. C.T.R., vol. 6, p. 272 (1984); and Sylvania Technical
Systems, Inc. v. The Government of the Islamic Republic of Iran,
ibid., vol. 8, p. 298 (1985). In the Delagoa Bay Railway case (footnote
561 above), and in Shufeldt (see footnote 87 above), lost profits
were awarded in respect of a concession which had been terminated.
In Sapphire International Petroleums Ltd. (see footnote 562 above),
p. 136; Libyan American Oil Company (LIAMCO) (see footnote 508
above), p. 140; and Amco Asia Corporation and Others v. The Republic
of Indonesia, First Arbitration; Annulment; Resubmitted case (see footnote
565 above), awards of lost profits were also sustained on the basis
of contractual relationships.
576 As in Sylvania Technical Systems, Inc. (see the footnote above).
577 See footnote 385 above.
578 See footnote 522 above.
which seek to discount speculative elements from projected
figures.
(33)  If loss of profits are to be awarded, it is inappropriate
to award interest under article 38 on the profit-earning
capital over the same period of time, simply because the
capital sum cannot be simultaneously earning interest and
generating profits. The essential aim is to avoid double
recovery while ensuring full reparation.
(34)  It is well established that incidental expenses are
compensable if they were reasonably incurred to repair
damage and otherwise mitigate loss arising from the
breach.579 Such expenses may be associated, for example,
with the displacement of staff or the need to store or sell
undelivered products at a loss.
Article 37.  Satisfaction
1.  The State responsible for an internationally
wrongful act is under an obligation to give satisfaction
for the injury caused by that act insofar as it cannot be
made good by restitution or compensation.
2.  Satisfaction may consist in an acknowledgement
of the breach, an expression of regret, a formal apology
or another appropriate modality.
3.  Satisfaction shall not be out of proportion to
the injury and may not take a form humiliating to the
responsible State.
Commentary
(1)  Satisfaction is the third form of reparation which the
responsible State may have to provide in discharge of its
obligation to make full reparation for the injury caused by
an internationally wrongful act. It is not a standard form
of reparation, in the sense that in many cases the injury
caused by an internationally wrongful act of a State may
be fully repaired by restitution and/or compensation. The
rather exceptional character of the remedy of satisfaction,
and its relationship to the principle of full reparation, are
emphasized by the phrase “insofar as [the injury] cannot
be made good by restitution or compensation”. It is only
in those cases where those two forms have not provided
full reparation that satisfaction may be required.
(2)  Article 37 is divided into three paragraphs, each
dealing with a separate aspect of satisfaction. Paragraph 1
addresses the legal character of satisfaction and the types
of injury for which it may be granted. Paragraph 2 describes,
in a non-exhaustive fashion, some modalities of
satisfaction. Paragraph 3 places limitations on the obliga-
579 Compensation for incidental expenses has been awarded by
UNCC (report and recommendations on the first instalment of “E2”
claims (S/AC.26/1998/7) where compensation was awarded for evacuation
and relief costs (paras. 133, 153 and 249), repatriation (para. 228),
termination costs (para. 214), renovation costs (para. 225) and expenses
in mitigation (para. 183)), and by the Iran-United States Claims Tribunal
(see General Electric Company v. The Government of the Islamic
Republic of Iran, Iran-U.S. C.T.R., vol. 26, p. 148, at pp. 165–169,
paras. 56–60 and 67–69 (1991), awarding compensation for items
resold at a loss and for storage costs).
106	 Report of the International Law Commission on the work of its fifty-third session
tion to give satisfaction, having regard to former practices
in cases where unreasonable forms of satisfaction were
sometimes demanded.
(3)  In accordance with paragraph 2 of article 31, the
injury for which a responsible State is obliged to make
full reparation embraces “any damage, whether material
or moral, caused by the internationally wrongful act of
a State”. Material and moral damage resulting from an
internationally wrongful act will normally be financially
assessable and hence covered by the remedy of compensation.
Satisfaction, on the other hand, is the remedy for
those injuries, not financially assessable, which amount
to an affront to the State. These injuries are frequently
of a symbolic character, arising from the very fact of the
breach of the obligation, irrespective of its material consequences
for the State concerned.
(4)  The availability of the remedy of satisfaction for injury
of this kind, sometimes described as “non-material
injury”,580 is well established in international law. The
point was made, for example, by the tribunal in the “Rainbow
Warrior” arbitration:
There is a long established practice of States and international Courts
and Tribunals of using satisfaction as a remedy or form of reparation
(in the wide sense) for the breach of an international obligation. This
practice relates particularly to the case of moral or legal damage done
directly to the State, especially as opposed to the case of damage to
persons involving international responsibilities.581
State practice also provides many instances of claims for
satisfaction in circumstances where the internationally
wrongful act of a State causes non-material injury to another
State. Examples include situations of insults to the
symbols of the State, such as the national flag,582 violations
of sovereignty or territorial integrity,583 attacks on
ships or aircraft,584 ill-treatment of or deliberate attacks
on heads of State or Government or diplomatic or consular
representatives or other protected persons585 and violations
of the premises of embassies or consulates or of
the residences of members of the mission.586
580 See C. Dominicé, “De la réparation constructive du préjudice
immatériel souffert par un État”, L’ordre juridique international entre
tradition et innovation: recueil d’études (Paris, Presses Universitaires
de France, 1997), p. 349, at p. 354.
581 “Rainbow Warrior” (see footnote 46 above), pp. 272–273,
para. 122.
582 Examples are the Magee case (Whiteman, Damages in International
Law, vol. I (see footnote 347 above), p. 64 (1874)), the Petit
Vaisseau case (La prassi italiana di diritto internazionale, 2nd series
(see footnote 498 above), vol. III, No. 2564 (1863)) and the case that
arose from the insult to the French flag in Berlin in 1920 (C. Eagleton,
The Responsibility of States in International Law (New York University
Press, 1928), pp. 186–187).
583 As occurred in the “Rainbow Warrior” arbitration (see footnote
46 above).
584 Examples include the attack carried out in 1961 against a Soviet
aircraft transporting President Brezhnev by French fighter planes over
the international waters of the Mediterranean (RGDIP, vol. 65 (1961),
p. 603); and the sinking of a Bahamian ship in 1980 by a Cuban aircraft
(ibid., vol. 84 (1980), pp. 1078–1079).
585 See F. Przetacznik, “La responsabilité internationale de l’État à
raison des préjudices de caractère moral et politique causés à un autre
État”, RGDIP, vol. 78 (1974), p. 919, at p. 951.
586 Examples include the attack by demonstrators in 1851 on the
Spanish Consulate in New Orleans (Moore, Digest, vol. VI, p. 811, at
p. 812), and the failed attempt of two Egyptian policemen, in 1888,
to intrude upon the premises of the Italian Consulate at Alexandria
(5)  Paragraph 2 of article 37 provides that satisfaction
may consist in an acknowledgement of the breach, an expression
of regret, a formal apology or another appropriate
modality. The forms of satisfaction listed in the article
are no more than examples. The appropriate form of satisfaction
will depend on the circumstances and cannot be
prescribed in advance.587 Many possibilities exist, including
due inquiry into the causes of an accident resulting in
harm or injury,588 a trust fund to manage compensation
payments in the interests of the beneficiaries, disciplinary
or penal action against the individuals whose conduct
caused the internationally wrongful act589 or the award of
symbolic damages for non-pecuniary injury.590 Assurances
or guarantees of non-repetition, which are dealt with in
the articles in the context of cessation, may also amount to
a form of satisfaction.591 Paragraph 2 does not attempt to
list all the possibilities, but neither is it intended to exclude
them. Moreover, the order of the modalities of satisfaction
in paragraph 2 is not intended to reflect any hierarchy
or preference. Paragraph 2 simply gives examples which
are not listed in order of appropriateness or seriousness.
The appropriate mode, if any, will be determined having
regard to the circumstances of each case.
(6)  One of the most common modalities of satisfaction
provided in the case of moral or non-material injury to
the State is a declaration of the wrongfulness of the act by
a competent court or tribunal. The utility of declaratory
relief as a form of satisfaction in the case of non-material
injury to a State was affirmed by ICJ in the Corfu Channel
case, where the Court, after finding unlawful a minesweeping
operation (Operation Retail) carried out by the
British Navy after the explosion, said:
[T]o ensure respect for international law, of which it is the organ, the
Court must declare that the action of the British Navy constituted a
violation of Albanian sovereignty.
(La prassi italiana di diritto internazionale, 2nd series (see footnote
498 above), vol. III, No. 2558). Also see cases of apologies and expressions
of regret following demonstrations in front of the French Embassy
in Belgrade in 1961 (RGDIP, vol. 65 (1961), p. 610), and the fires
in the libraries of the United States Information Services in Cairo in
1964 (ibid., vol. 69 (1965), pp. 130–131) and in Karachi in 1965 (ibid.,
vol. 70 (1966), pp. 165–166).
587 In the “Rainbow Warrior” arbitration the tribunal, while rejecting
New Zealand’s claims for restitution and/or cessation and declining to
award compensation, made various declarations by way of satisfaction,
and in addition a recommendation “to assist [the parties] in putting an
end to the present unhappy affair”. Specifically, it recommended that
France contribute US$ 2 million to a fund to be established “to promote
close and friendly relations between the citizens of the two countries”
(see footnote 46 above), p. 274, paras. 126–127. See also L. Migliorino,
“Sur la déclaration d’illicéité comme forme de satisfaction: à propos
de la sentence arbitrale du 30 avril 1990 dans l’affaire du Rainbow
Warrior”, RGDIP, vol. 96 (1992), p. 61.
588 For example, the United States naval inquiry into the causes of
the collision between an American submarine and the Japanese fishing
vessel, the Ehime Maru, in waters off Honolulu, The New York Times,
8 February 2001, sect. 1, p. 1.
589 Action against the guilty individuals was requested in the case
of the killing in 1948, in Palestine, of Count Bernadotte while he was
acting in the service of the United Nations (Whiteman, Digest of International
Law, vol. 8, pp. 742–743) and in the case of the killing of two
United States officers in Tehran (RGDIP, vol. 80 (1976, p. 257).
590 See, e.g., the cases “I’m Alone”, UNRIAA, vol. III (Sales
No. 1949.V.2), p. 1609 (1935); and “Rainbow Warrior” (footnote 46
above).
591 See paragraph (11) of the commentary to article 30.
	 State responsibility	 107
This declaration is in accordance with the request made by Albania
through her Counsel, and is in itself appropriate satisfaction.592
This has been followed in many subsequent cases.593
However, while the making of a declaration by a competent
court or tribunal may be treated as a form of satisfaction
in a given case, such declarations are not intrinsically
associated with the remedy of satisfaction. Any
court or tribunal which has jurisdiction over a dispute has
the authority to determine the lawfulness of the conduct
in question and to make a declaration of its findings, as
a necessary part of the process of determining the case.
Such a declaration may be a preliminary to a decision
on any form of reparation, or it may be the only remedy
sought. What the Court did in the Corfu Channel case was
to use a declaration as a form of satisfaction in a case
where Albania had sought no other form. Moreover, such
a declaration has further advantages: it should be clear
and self-contained and will by definition not exceed the
scope or limits of satisfaction referred to in paragraph 3
of article 37. A judicial declaration is not listed in paragraph
2 only because it must emanate from a competent
third party with jurisdiction over a dispute, and the articles
are not concerned to specify such a party or to deal with
issues of judicial jurisdiction. Instead, article 37 specifies
the acknowledgement of the breach by the responsible
State as a modality of satisfaction.
(7)  Another common form of satisfaction is an apology,
which may be given verbally or in writing by an appropriate
official or even the Head of State. Expressions of
regret or apologies were required in the “I’m Alone”,594
Kellett595 and “Rainbow Warrior”596 cases, and were offered
by the responsible State in the Consular Relations597
and LaGrand598 cases. Requests for, or offers of, an apology
are a quite frequent feature of diplomatic practice and
the tender of a timely apology, where the circumstances
justify it, can do much to resolve a dispute. In other circumstances
an apology may not be called for, e.g. where
a case is settled on an ex gratia basis, or it may be insufficient.
In the LaGrand case the Court considered that “an
apology is not sufficient in this case, as it would not be in
other cases where foreign nationals have not been advised
without delay of their rights under article 36, paragraph
1, of the Vienna Convention and have been subjected to
prolonged detention or sentenced to severe penalties”.599
592 Corfu Channel, Merits (see footnote 35 above), p. 35, repeated in
the operative part (p. 36).
593 For example, “Rainbow Warrior” (see footnote 46 above),
p. 273, para. 123.
594 See footnote 590 above.
595 Moore, Digest, vol. V, p. 44 (1897).
596 See footnote 46 above.
597 Vienna Convention on Consular Relations (Paraguay v. United
States of America), Provisional Measures, Order of 9 April 1998,
I.C.J. Reports 1998, p. 248. For the text of the United States’ apology,
see United States Department of State, Text of Statement Released in
Asunción, Paraguay; Press statement by James P. Rubin, Spokesman,
4 November 1998. For the order discontinuing proceedings of
10 November 1998, see I.C.J. Reports 1998, p. 426.
598 See footnote 119 above.
599 LaGrand, Merits (ibid.), para. 123.
(8)  Excessive demands made under the guise of “satisfaction”
in the past600 suggest the need to impose some
limit on the measures that can be sought by way of satisfaction
to prevent abuses, inconsistent with the principle
of the equality of States.601 In particular, satisfaction is
not intended to be punitive in character, nor does it include
punitive damages. Paragraph 3 of article 37 places
limitations on the obligation to give satisfaction by setting
out two criteria: first, the proportionality of satisfaction to
the injury; and secondly, the requirement that satisfaction
should not be humiliating to the responsible State. It is
true that the term “humiliating” is imprecise, but there are
certainly historical examples of demands of this kind.
Article 38.  Interest
1.  Interest on any principal sum due under this
chapter shall be payable when necessary in order to
ensure full reparation. The interest rate and mode of
calculation shall be set so as to achieve that result.
2.  Interest runs from the date when the principal
sum should have been paid until the date the obligation
to pay is fulfilled.
Commentary
(1)  Interest is not an autonomous form of reparation,
nor is it a necessary part of compensation in every case.
For this reason the term “principal sum” is used in article
38 rather than “compensation”. Nevertheless, an
award of interest may be required in some cases in order
to provide full reparation for the injury caused by an internationally
wrongful act, and it is normally the subject
of separate treatment in claims for reparation and in the
awards of tribunals.
(2)  As a general principle, an injured State is entitled
to interest on the principal sum representing its loss, if
that sum is quantified as at an earlier date than the date
of the settlement of, or judgement or award concerning,
the claim and to the extent that it is necessary to ensure
full reparation.602 Support for a general rule favouring the
award of interest as an aspect of full reparation is found in
international jurisprudence.603 In the S.S. “Wimbledon”,
PCIJ awarded simple interest at 6 per cent as from the
date of judgment, on the basis that interest was only payable
“from the moment when the amount of the sum due
600 For example, the joint note presented to the Chinese Government
in 1900 following the Boxer uprising and the demand by the Conference
of Ambassadors against Greece in the Tellini affair in 1923: see
C. Eagleton, op. cit. (footnote 582 above), pp. 187–188.
601 The need to prevent the abuse of satisfaction was stressed by early
writers such as J. C. Bluntschli, Das moderne Völkerrecht der civilisirten
Staten als Rechtsbuch dargestellt, 3rd ed. (Nördlingen, Beck,
1878); French translation by M. C. Lardy, Le droit international codifié,
5th rev. ed. (Paris, Félix Alcan, 1895), pp. 268–269.
602 Thus, interest may not be allowed where the loss is assessed in
current value terms as at the date of the award. See the Lighthouses
arbitration (footnote 182 above), pp. 252–253.
603 See, e.g., the awards of interest made in the Illinois Central Railroad
Co. (U.S.A.) v. United Mexican States case, UNRIAA, vol. IV
(Sales No. 1951.V.1), p. 134 (1926); and the Lucas case, ILR, vol. 30,
p. 220 (1966); see also administrative decision No. III of the United
States-Germany Mixed Claims Commission, UNRIAA, vol. VII (Sales
No. 1956.V.5), p. 66 (1923).
108	 Report of the International Law Commission on the work of its fifty-third session
has been fixed and the obligation to pay has been estab-
lished”.604
(3)  Issues of the award of interest have frequently arisen
in other tribunals, both in cases where the underlying claim
involved injury to private parties and where the injury was
to the State itself.605 The experience of the Iran-United
States Claims Tribunal is worth noting. In The Islamic
Republic of Iran v. The United States of America (Case
A–19), the FullTribunal held that its general jurisdiction to
deal with claims included the power to award interest, but
it declined to lay down uniform standards for the award of
interest on the ground that this fell within the jurisdiction
of each Chamber and related “to the exercise … of the
discretion accorded to them in deciding each particular
case”.606 On the issue of principle the tribunal said:
Claims for interest are part of the compensation sought and do not
constitute a separate cause of action requiring their own independent
jurisdictional grant. This Tribunal is required by [a]rticle V of the
Claims Settlement Declaration to decide claims “on the basis of respect
for law”. In doing so, it has regularly treated interest, where sought, as
forming an integral part of the “claim” which it has a duty to decide.
The Tribunal notes that the Chambers have been consistent in awarding
interest as “compensation for damages suffered due to delay in payment”.
… Indeed, it is customary for arbitral tribunals to award interest
as part of an award for damages, notwithstanding the absence of any
express reference to interest in the compromis. Given that the power to
award interest is inherent in the Tribunal’s authority to decide claims,
the exclusion of such power could only be established by an express
provision in the Claims Settlement Declaration. No such provision exists.
Consequently, the Tribunal concludes that it is clearly within its
power to award interest as compensation for damage suffered.607
The tribunal has awarded interest at a different and slightly
lower rate in respect of intergovernmental claims.608
It has not awarded interest in certain cases, for example
where a lump-sum award was considered as reflecting full
compensation, or where other special circumstances per-
tained.609
(4)  Decision 16 of the Governing Council of the United
Nations Compensation Commission deals with the question
of interest. It provides:
1.  Interest will be awarded from the date the loss occurred until
the date of payment, at a rate sufficient to compensate successful claimants
for the loss of use of the principal amount of the award.
2.  The methods of calculation and of payment of interest will be
considered by the Governing Council at the appropriate time.
604 See footnote 34 above. The Court accepted the French claim for
an interest rate of 6 per cent as fair, having regard to “the present financial
situation of the world and … the conditions prevailing for public
loans”.
605 In the M/V “Saiga” case (see footnote 515 above), ITLOS awarded
interest at different rates in respect of different categories of loss
(para. 173).
606 The Islamic Republic of Iran v. The United States of America,
Iran-U.S. C.T.R., vol. 16, p. 285, at p. 290 (1987). Aldrich, op. cit.
(see footnote 357 above), pp. 475–476, points out that the practice of
the three Chambers has not been entirely uniform.
607 The Islamic Republic of Iran v. The United States of America
(see footnote 606 above), pp. 289–290.
608 See C. N. Brower and J. D. Brueschke, op. cit. (footnote 520
above), pp. 626–627, with references to the cases. The rate adopted was
10 per cent, as compared with 12 per cent for commercial claims.
609 See the detailed analysis of Chamber Three in McCollough and
Company, Inc. v. Ministry of Post, Telegraph and Telephone, Iran-U.S.
C.T.R., vol. 11, p. 3, at pp. 26–31 (1986).
3.  Interest will be paid after the principal amount of awards.610
This provision combines a decision in principle in favour
of interest where necessary to compensate a claimant with
flexibility in terms of the application of that principle.
At the same time, interest, while a form of compensation,
is regarded as a secondary element, subordinated to the
principal amount of the claim.
(5)  Awards of interest have also been envisaged by human
rights courts and tribunals, even though the compensation
practice of these bodies is relatively cautious and
the claims are almost always unliquidated. This is done,
for example, to protect the value of a damages award
payable by instalments over time.611
(6)  In their more recent practice, national compensation
commissions and tribunals have also generally allowed
for interest in assessing compensation. However in certain
cases of partial lump-sum settlements, claims have been
expressly limited to the amount of the principal loss, on
the basis that with a limited fund to be distributed, claims
to principal should take priority.612 Some national court
decisions have also dealt with issues of interest under international
law,613 although more often questions of interest
are dealt with as part of the law of the forum.
(7)  Although the trend of international decisions and
practice is towards greater availability of interest as an aspect
of full reparation, an injured State has no automatic
entitlement to the payment of interest. The awarding of
interest depends on the circumstances of each case; in
particular, on whether an award of interest is necessary
in order to ensure full reparation. This approach is compatible
with the tradition of various legal systems as well
as the practice of international tribunals.
(8)  An aspect of the question of interest is the possible
award of compound interest. The general view of courts
and tribunals has been against the award of compound
interest, and this is true even of those tribunals which
hold claimants to be normally entitled to compensatory
interest. For example, the Iran-United States Claims
Tribunal has consistently denied claims for compound
interest, including in cases where the claimant suffered
losses through compound interest charges on indebtedness
associated with the claim. In R.J. Reynolds Tobacco
Co. v. The Government of the Islamic Republic of Iran,
the tribunal failed to find:
any special reasons for departing from international precedents
which normally do not allow the awarding of compound interest. As
noted by one authority, “[t]here are few rules within the scope of the
610 Awards of interest, decision of 18 December 1992 (S/
AC.26/1992/16).
611 See, e.g., the Velásquez Rodríguez, Compensatory Damages case
(footnote 516 above), para. 57. See also Papamichalopoulos (footnote
515 above), para. 39, where interest was payable only in respect of
the pecuniary damage awarded. See further D. Shelton, op. cit. (footnote
521 above), pp. 270–272.
612 See, e.g., the Foreign Compensation (People’s Republic of China),
Order, Statutory Instrument No. 2201 (1987) (London, HM Stationery
Office), para. 10, giving effect to the settlement Agreement between the
United Kingdom and China (footnote 551 above).
613 See, e.g., McKesson Corporation v. The Islamic Republic of
Iran, United States District Court for the District of Columbia, 116 F,
Supp. 2d 13 (2000).
	 State responsibility	 109
subject of damages in international law that are better settled than the
one that compound interest is not allowable” … Even though the term
“all sums” could be construed to include interest and thereby to allow
compound interest, the Tribunal, due to the ambiguity of the language,
interprets the clause in the light of the international rule just stated, and
thus excludes compound interest. 614
Consistent with this approach, the tribunal has gone
behind contractual provisions appearing to provide for
compound interest, in order to prevent the claimant gaining
a profit “wholly out of proportion to the possible loss
that [it] might have incurred by not having the amounts
due at its disposal”.615 The preponderance of authority
thus continues to support the view expressed by Arbitrator
Huber in the British Claims in the Spanish Zone of
Morocco case:
the arbitral case law in matters involving compensation of one State for
another for damages suffered by the nationals of one within the territory
of the other … is unanimous … in disallowing compound interest. In
these circumstances, very strong and quite specific arguments would be
called for to grant such interest.616
The same is true for compound interest in respect of Stateto-State
claims.
(9)  Nonetheless, several authors have argued for a reconsideration
of this principle, on the ground that “compound
interest reasonably incurred by the injured party
should be recoverable as an item of damage”.617 This
view has also been supported by arbitral tribunals in some
cases.618 But given the present state of international law,
it cannot be said that an injured State has any entitlement
to compound interest, in the absence of special circumstances
which justify some element of compounding as an
aspect of full reparation.
(10)  The actual calculation of interest on any principal
sum payable by way of reparation raises a complex of issues
concerning the starting date (date of breach,619 date
on which payment should have been made, date of claim
or demand), the terminal date (date of settlement agreement
or award, date of actual payment) as well as the applicable
interest rate (rate current in the respondent State,
in the applicant State, international lending rates). There
614 Iran-U.S. C.T.R., vol. 7, p. 181, at pp. 191–192 (1984), citing
Whiteman, Damages in International Law, vol. III (see footnote 568
above), p. 1997.
615 Anaconda-Iran, Inc. v. The Government of the Islamic Republic
of Iran, Iran-U.S. C.T.R., vol. 13, p. 199, at p. 235 (1986). See also
Aldrich, op. cit. (footnote 357 above), pp. 477–478.
616 British Claims in the Spanish Zone of Morocco (see footnote 44
above), p. 650. Cf. the Aminoil arbitration (footnote 496 above), where
the interest awarded was compounded for a period without any reason
being given. This accounted for more than half of the total final award
(p. 613, para. 178 (5)).
617 F. A. Mann, “Compound interest as an item of damage in international
law”, Further Studies in International Law (Oxford, Clarendon
Press, 1990), p. 377, at p. 383.
618 See, e.g., Compañía del Desarrollo de Santa Elena, S.A. v. Republic
of Costa Rica, case No. ARB/96/1, ICSID Reports (Cambridge, Grotius,
2002), vol. 5, final award (17 February 2000), paras. 103–105.
619 Using the date of the breach as the starting date for calculation of
the interest term is problematic as there may be difficulties in determining
that date, and many legal systems require a demand for payment by
the claimant before interest will run. The date of formal demand was
taken as the relevant date in the Russian Indemnity case (see footnote
354 above), p. 442, by analogy from the general position in European
legal systems. In any event, failure to make a timely claim for payment
is relevant in deciding whether to allow interest.
is no uniform approach, internationally, to questions of
quantification and assessment of amounts of interest payable.620
In practice, the circumstances of each case and the
conduct of the parties strongly affect the outcome. There
is wisdom in the Iran-United States Claims Tribunal’s observation
that such matters, if the parties cannot resolve
them, must be left “to the exercise … of the discretion accorded
to [individual tribunals] in deciding each particular
case”.621 On the other hand, the present unsettled state
of practice makes a general provision on the calculation of
interest useful. Accordingly, article 38 indicates that the
date from which interest is to be calculated is the date
when the principal sum should have been paid. Interest
runs from that date until the date the obligation to pay is
fulfilled. The interest rate and mode of calculation are to
be set so as to achieve the result of providing full reparation
for the injury suffered as a result of the internationally
wrongful act.
(11)  Where a sum for loss of profits is included as part
of the compensation for the injury caused by a wrongful
act, an award of interest will be inappropriate if the
injured State would thereby obtain double recovery. A
capital sum cannot be earning interest and notionally
employed in earning profits at one and the same time.
However, interest may be due on the profits which would
have been earned but which have been withheld from the
original owner.
(12)  Article 38 does not deal with post-judgement or
moratory interest. It is only concerned with interest that
goes to make up the amount that a court or tribunal should
award, i.e. compensatory interest. The power of a court or
tribunal to award post-judgement interest is a matter of its
procedure.
Article 39.  Contribution to the injury
In the determination of reparation, account shall
be taken of the contribution to the injury by wilful or
negligent action or omission of the injured State or
any person or entity in relation to whom reparation is
sought.
Commentary
(1)  Article 39 deals with the situation where damage
has been caused by an internationally wrongful act of a
State, which is accordingly responsible for the damage in
accordance with articles 1 and 28, but where the injured
State, or the individual victim of the breach, has materially
620 See, e.g., J. Y. Gotanda, Supplemental Damages in Private International
Law (The Hague, Kluwer, 1998), p. 13. It should be noted
that a number of Islamic countries, influenced by the sharia, prohibit
payment of interest under their own law or even under their constitution.
However, they have developed alternatives to interest in the commercial
and international context. For example, payment of interest is prohibited
by the Iranian Constitution, articles 43 and 49, but the Guardian
Council has held that this injunction does not apply to “foreign
governments, institutions, companies and persons, who, according to
their own principles of faith, do not consider [interest] as being prohibited”
(ibid., pp. 38–40, with references).
621 The Islamic Republic of Iran v. The United States of America
(Case No. A-19) (see footnote 606 above).
110	 Report of the International Law Commission on the work of its fifty-third session
contributed to the damage by some wilful or negligent act
or omission. Its focus is on situations which in national
law systems are referred to as “contributory negligence”,
“comparative fault”, “faute de la victime”, etc.622
(2)  Article 39 recognizes that the conduct of the injured
State, or of any person or entity in relation to whom reparation
is sought, should be taken into account in assessing
the form and extent of reparation. This is consonant with
the principle that full reparation is due for the injury—but
nothing more—arising in consequence of the internationally
wrongful act. It is also consistent with fairness as
between the responsible State and the victim of the
breach.
(3)  In the LaGrand case, ICJ recognized that the conduct
of the claimant State could be relevant in determining
the form and amount of reparation. There, Germany
had delayed in asserting that there had been a breach and
in instituting proceedings. The Court noted that “Germany
may be criticized for the manner in which these proceedings
were filed and for their timing”, and stated that
it would have taken this factor, among others, into account
“had Germany’s submission included a claim for indem-
nification”.623
(4)  The relevance of the injured State’s contribution to
the damage in determining the appropriate reparation is
widely recognized in the literature624 and in State practice.625
While questions of an injured State’s contribution
to the damage arise most frequently in the context of
compensation, the principle may also be relevant to other
forms of reparation. For example, if a State-owned ship is
unlawfully detained by another State and while under detention
sustains damage attributable to the negligence of
the captain, the responsible State may be required merely
to return the ship in its damaged condition.
(5)  Not every action or omission which contributes to
the damage suffered is relevant for this purpose. Rather,
article 39 allows to be taken into account only those actions
or omissions which can be considered as wilful or
negligent, i.e. which manifest a lack of due care on the
part of the victim of the breach for his or her own property
or rights.626 While the notion of a negligent action or
622 See C. von Bar, op. cit. (footnote 315 above), pp. 544–569.
623 LaGrand, Judgment (see footnote 119 above), at p. 487, para. 57,
and p. 508, para. 116. For the relevance of delay in terms of loss of
the right to invoke responsibility, see article 45, subparagraph (b), and
commentary.
624 See, e.g., B. Graefrath, “Responsibility and damages caused:
relationship between responsibility and damages” (footnote 454 above)
and B. Bollecker-Stern, op. cit. (footnote 454 above), pp. 265–300.
625 In the Delagoa Bay Railway case (see footnote 561 above), the arbitrators
noted that: “[a]ll the circumstances that can be adduced against
the concessionaire company and for the Portuguese Government mitigate
the latter’s liability and warrant ... a reduction in reparation.” In
S.S. “Wimbledon” (see footnote 34 above), p. 31, a question arose as
to whether there had been any contribution to the injury suffered as a
result of the ship harbouring at Kiel for some time, following refusal
of passage through the Kiel Canal, before taking an alternative course.
PCIJ implicitly acknowledged that the captain’s conduct could affect
the amount of compensation payable, although it held that the captain
had acted reasonably in the circumstances. For other examples, see
Gray, op. cit. (footnote 432 above), p. 23.
626 This terminology is drawn from article VI, paragraph 1, of the
Convention on International Liability for Damage Caused by Space
Objects.
omission is not qualified, e.g. by a requirement that the
negligence should have reached the level of being “serious”
or “gross”, the relevance of any negligence to reparation
will depend upon the degree to which it has contributed
to the damage as well as the other circumstances of
the case.627 The phrase “account shall be taken” indicates
that the article deals with factors that are capable of affecting
the form or reducing the amount of reparation in
an appropriate case.
(6)  The wilful or negligent action or omission which
contributes to the damage may be that of the injured State
or “any person or entity in relation to whom reparation is
sought”. This phrase is intended to cover not only the situation
where a State claims on behalf of one of its nationals
in the field of diplomatic protection, but also any other
situation in which one State invokes the responsibility of
another State in relation to conduct primarily affecting
some third party. Under articles 42 and 48, a number of
different situations can arise where this may be so. The
underlying idea is that the position of the State seeking
reparation should not be more favourable, so far as reparation
in the interests of another is concerned, than it would
be if the person or entity in relation to whom reparation is
sought were to bring a claim individually.
Chapter III
SERIOUS BREACHES OF OBLIGATIONS UNDER
PEREMPTORY NORMS OF GENERAL
INTERNATIONAL LAW
Commentary
(1)  Chapter III of Part Two is entitled “Serious breaches
of obligations under peremptory norms of general international
law”. It sets out certain consequences of specific
types of breaches of international law, identified by
reference to two criteria: first, they involve breaches of
obligations under peremptory norms of general international
law; and secondly, the breaches concerned are in
themselves serious, having regard to their scale or character.
Chapter III contains two articles, the first defining
its scope of application (art. 40), the second spelling out
the legal consequences entailed by the breaches coming
within the scope of the chapter (art. 41).
(2)  Whether a qualitative distinction should be recognized
between different breaches of international law
has been the subject of a major debate.628 The issue was
underscored by ICJ in the Barcelona Traction case, when
it said that:
627 It is possible to envisage situations where the injury in question
is entirely attributable to the conduct of the victim and not at all to that
of the “responsible” State. Such situations are covered by the general
requirement of proximate cause referred to in article 31, rather than by
article 39. On questions of mitigation of damage, see paragraph (11) of
the commentary to article 31.
628 For full bibliographies, see M. Spinedi, “Crimes of State: bibliography”,
International Crimes of State, J. H. H. Weiler, A. Cassese
and M. Spinedi, eds. (Berlin, De Gruyter, 1989), pp. 339–353; and
N. H. B. Jørgensen, The Responsibility of States for International
Crimes (Oxford University Press, 2000) pp. 299–314.
	 State responsibility	 111
an essential distinction should be drawn between the obligations of a
State towards the international community as a whole, and those arising
vis-à-vis another State in the field of diplomatic protection. By their
very nature the former are the concern of all States. In view of the
importance of the rights involved, all States can be held to have a legal
interest in their protection; they are obligations erga omnes.629
The Court was there concerned to contrast the position
of an injured State in the context of diplomatic protection
with the position of all States in respect of the breach of
an obligation towards the international community as a
whole. Although no such obligation was at stake in that
case, the Court’s statement clearly indicates that for the
purposes of State responsibility certain obligations are
owed to the international community as a whole, and that
by reason of “the importance of the rights involved” all
States have a legal interest in their protection.
(3)  On a number of subsequent occasions the Court has
taken the opportunity to affirm the notion of obligations
to the international community as a whole, although it
has been cautious in applying it. In the East Timor case,
the Court said that “Portugal’s assertion that the right
of peoples to self-determination, as it evolved from the
Charter and from United Nations practice, has an erga
omnes character, is irreproachable”.630 At the preliminary
objections stage of the Application of the Convention on
the Prevention and Punishment of the Crime of Genocide
case, it stated that “the rights and obligations enshrined by
the [Genocide] Convention are rights and obligations erga
omnes”:631 this finding contributed to its conclusion that
its temporal jurisdiction over the claim was not limited
to the time after which the parties became bound by the
Convention.
(4)  A closely related development is the recognition of
the concept of peremptory norms of international law in
articles 53 and 64 of the 1969 Vienna Convention. These
provisions recognize the existence of substantive norms
of a fundamental character, such that no derogation from
them is permitted even by treaty.632
(5)  From the first it was recognized that these developments
had implications for the secondary rules of State
responsibility which would need to be reflected in some
way in the articles. Initially, it was thought this could be
done by reference to a category of “international crimes
of State”, which would be contrasted with all other cases
of internationally wrongful acts (“international delicts”).633
There has been, however, no development of
penal consequences for States of breaches of these fundamental
norms. For example, the award of punitive damages
is not recognized in international law even in relation
to serious breaches of obligations arising under peremptory
norms. In accordance with article 34, the function
629 Barcelona Traction (see footnote 25 above), p. 32, para. 33.
See M. Ragazzi, The Concept of International Obligations Erga Omnes
(Oxford, Clarendon Press, 1997).
630 See footnote 54 above.
631 Application of the Convention on the Prevention and Punishment
of the Crime of Genocide, Preliminary Objections (see footnote 54
above), p. 616, para. 31.
632 See article 26 and commentary.
633 See Yearbook … 1976, vol. II (Part Two), pp. 95–122,
especially paras. (6)–(34). See also paragraph (5) of the commentary
to article 12.
of damages is essentially compensatory.634 Overall, it
remains the case, as the International Military Tribunal
said in 1946, that “[c]rimes against international law are
committed by men, not by abstract entities, and only by
punishing individuals who commit such crimes can the
provisions of international law be enforced”.635
(6)  In line with this approach, despite the trial and conviction
by the Nuremberg and Tokyo Military Tribunals
of individual government officials for criminal acts committed
in their official capacity, neither Germany nor
Japan were treated as “criminal” by the instruments creating
these tribunals.636 As to more recent international
practice, a similar approach underlies the establishment
of the ad hoc tribunals for Yugoslavia and Rwanda by
the Security Council. Both tribunals are concerned only
with the prosecution of individuals.637 In its decision relating
to a subpoena duces tecum in the Blaskic´ case, the
Appeals Chamber of the International Tribunal for the
Former Yugoslavia stated that “[u]nder present international
law it is clear that States, by definition, cannot be
the subject of criminal sanctions akin to those provided
for in national criminal systems”.638 The Rome Statute
of the International Criminal Court likewise establishes
jurisdiction over the “most serious crimes of concern to
the international community as a whole” (preamble), but
limits this jurisdiction to “natural persons” (art. 25, para.
1). The same article specifies that no provision of the Statute
“relating to individual criminal responsibility shall affect
the responsibility of States under international law”
(para. 4).639
(7)  Accordingly, the present articles do not recognize
the existence of any distinction between State “crimes”
and “delicts” for the purposes of Part One. On the other
hand, it is necessary for the articles to reflect that there are
certain consequences flowing from the basic concepts of
peremptory norms of general international law and obligations
to the international community as a whole within
the field of State responsibility. Whether or not peremptory
norms of general international law and obligations to
the international community as a whole are aspects of a
single basic idea, there is at the very least substantial overlap
between them. The examples which ICJ has given of
634 See paragraph (4) of the commentary to article 36.
635 International Military Tribunal (Nuremberg), judgement of
1 October 1946, reprinted in AJIL (see footnote 321 above), p. 221.
636 This despite the fact that the London Charter of 1945 specifically
provided for the condemnation of a “group or organization” as
“criminal”; see Charter of the International Military Tribunal, Agreement
for the Prosecution and Punishment of Major War Criminals
of the European Axis, annex, United Nations, Treaty Series, vol. 82,
No. 251, p. 279, arts. 9 and 10.
637 See, respectively, articles 1 and 6 of the statute of the International
Tribunal for the FormerYugoslavia; and articles 1 and 7 of the statute
of the International Tribunal for Rwanda (footnote 257 above).
638 Prosecutor v. Blaski´c, International Tribunal for the Former
Yugoslavia, Case IT-95-14-AR 108 bis, ILR, vol. 110, p. 688, at p. 698,
para. 25 (1997). Cf. Application of the Convention on the Prevention
and Punishment of the Crime of Genocide, Preliminary Objections
(footnote 54 above), in which neither of the parties treated the
proceedings as being criminal in character. See also paragraph (6) of the
commentary to article 12.
639 See also article 10: “Nothing in this Part shall be interpreted as
limiting or prejudicing in any way existing or developing rules of international
law for purposes other than this Statute.”
112	 Report of the International Law Commission on the work of its fifty-third session
obligations towards the international community as a
whole640 all concern obligations which, it is generally accepted,
arise under peremptory norms of general international
law. Likewise the examples of peremptory norms
given by the Commission in its commentary to what became
article 53 of the 1969 Vienna Convention641 involve
obligations to the international community as a whole. But
there is at least a difference in emphasis. While peremptory
norms of general international law focus on the scope
and priority to be given to a certain number of fundamental
obligations, the focus of obligations to the international
community as a whole is essentially on the legal interest
of all States in compliance—i.e. in terms of the present articles,
in being entitled to invoke the responsibility of any
State in breach. Consistently with the difference in their
focus, it is appropriate to reflect the consequences of the
two concepts in two distinct ways. First, serious breaches
of obligations arising under peremptory norms of general
international law can attract additional consequences, not
only for the responsible State but for all other States. Secondly,
all States are entitled to invoke responsibility for
breaches of obligations to the international community as
a whole. The first of these propositions is the concern of
the present chapter; the second is dealt with in article 48.
Article 40.  Application of this chapter
1.  This chapter applies to the international responsibility
which is entailed by a serious breach by
a State of an obligation arising under a peremptory
norm of general international law.
2.  A breach of such an obligation is serious if it involves
a gross or systematic failure by the responsible
State to fulfil the obligation.
Commentary
(1)  Article 40 serves to define the scope of the breaches
covered by the chapter. It establishes two criteria in order
to distinguish “serious breaches of obligations under peremptory
norms of general international law” from other
types of breaches. The first relates to the character of the
obligation breached, which must derive from a peremptory
norm of general international law. The second qualifies
640 According to ICJ, obligations erga omnes “derive, for example, in
contemporary international law, from the outlawing of acts of aggression,
and of genocide, as also from the principles and rules concerning
the basic rights of the human person, including protection from slavery
and racial discrimination”: Barcelona Traction (see footnote 25 above),
at p. 32, para. 34. See also East Timor (footnote 54 above); Legality of
the Threat or Use of Nuclear Weapons (ibid.); and Application of the
Convention on the Prevention and Punishment of the Crime of Genocide,
Preliminary Objections (ibid.).
641 The Commission gave the following examples of treaties which
would violate the article due to conflict with a peremptory norm of
general international law, or a rule of jus cogens: “(a) a treaty contemplating
an unlawful use of force contrary to the principles of the
Charter, (b) a treaty contemplating the performance of any other act
criminal under international law, and (c) a treaty contemplating or
conniving at the commission of such acts, such as trade in slaves, piracy
or genocide, in the suppression of which every State is called upon to
co-operate … treaties violating human rights, the equality of States or
the principle of self-determination were mentioned as other possible
examples”, Yearbook … 1966, vol. II, p. 248.
the intensity of the breach, which must have been serious
in nature. Chapter III only applies to those violations of
international law that fulfil both criteria.
(2)  The first criterion relates to the character of the obligation
breached. In order to give rise to the application of
this chapter, a breach must concern an obligation arising
under a peremptory norm of general international law. In
accordance with article 53 of the 1969 Vienna Convention,
a peremptory norm of general international law is
one which is:
accepted and recognized by the international community of States as a
whole as a norm from which no derogation is permitted and which can
be modified only by a subsequent norm of general international law
having the same character.
The concept of peremptory norms of general international
law is recognized in international practice, in the jurisprudence
of international and national courts and tribunals
and in legal doctrine.642
(3)  It is not appropriate to set out examples of the peremptory
norms referred to in the text of article 40 itself,
any more than it was in the text of article 53 of the 1969
Vienna Convention. The obligations referred to in article
40 arise from those substantive rules of conduct that prohibit
what has come to be seen as intolerable because of
the threat it presents to the survival of States and their
peoples and the most basic human values.
(4)  Among these prohibitions, it is generally agreed that
the prohibition of aggression is to be regarded as peremptory.
This is supported, for example, by the Commission’s
commentary to what was to become article 53,643 uncontradicted
statements by Governments in the course of the
Vienna Conference on the Law of Treaties,644 the submissions
of both parties in the Military and Paramilitary
Activities in and against Nicaragua case and the Court’s
own position in that case.645 There also seems to be widespread
agreement with other examples listed in the Commission’s
commentary to article 53: viz. the prohibitions
against slavery and the slave trade, genocide, and racial
discrimination and apartheid. These practices have been
prohibited in widely ratified international treaties and
conventions admitting of no exception. There was general
agreement among Governments as to the peremptory
character of these prohibitions at the Vienna Conference.
As to the peremptory character of the prohibition against
642 For further discussion of the requirements for identification of a
norm as peremptory, see paragraph (5) of the commentary to article 26,
with selected references to the case law and literature.
643 Yearbook … 1966, vol. II, pp. 247–249.
644 In the course of the conference, a number of Governments
characterized as peremptory the prohibitions against aggression and
the illegal use of force: see Official Records of the United Nations 
Conference on the Law of Treaties, First Session, Vienna, 26 March to
24 May 1968, summary records of the plenary meeting and of the meetings
of the Committee of the Whole (United Nations publication, Sales
No. E.68.V.7), 52nd meeting, paras. 3, 31 and 43; 53rd meeting,
paras. 4, 9, 15, 16, 35, 48, 59 and 69; 54th meeting, paras. 9, 41, 46
and 55; 55th meeting, paras. 31 and 42; and 56th meeting, paras. 6, 20,
29 and 51.
645 Military and Paramilitary Activities in and against Nicaragua
(see footnote 36 above), pp. 100–101, para. 190; see also the separate
opinion of magistrate Nagendra Singh (president), p. 153.
	 State responsibility	 113
genocide, this is supported by a number of decisions by
national and international courts.646
(5)  Although not specifically listed in the Commission’s
commentary to article 53 of the 1969 Vienna Convention,
the peremptory character of certain other norms
seems also to be generally accepted. This applies to the
prohibition against torture as defined in article 1 of the
Convention against Torture and Other Cruel, Inhuman
or Degrading Treatment or Punishment. The peremptory
character of this prohibition has been confirmed by decisions
of international and national bodies.647 In the light
of the description by ICJ of the basic rules of international
humanitarian law applicable in armed conflict as “intransgressible”
in character, it would also seem justified to treat
these as peremptory.648 Finally, the obligation to respect
the right of self-determination deserves to be mentioned.
As the Court noted in the East Timor case, “[t]he principle
of self-determination ... is one of the essential principles
of contemporary international law”, which gives rise to an
obligation to the international community as a whole to
permit and respect its exercise.649
(6)  It should be stressed that the examples given above
may not be exhaustive. In addition, article 64 of the 1969
Vienna Convention contemplates that new peremptory
norms of general international law may come into existence
through the processes of acceptance and recognition
by the international community of States as a whole,
as referred to in article 53. The examples given here are
thus without prejudice to existing or developing rules of
international law which fulfil the criteria for peremptory
norms under article 53.
(7)  Apart from its limited scope in terms of the comparatively
small number of norms which qualify as peremptory,
article 40 applies a further limitation for the
purposes of the chapter, viz. that the breach should itself
have been “serious”. A “serious” breach is defined in
paragraph 2 as one which involves “a gross or systematic
failure by the responsible State to fulfil the obligation”
in question. The word “serious” signifies that a certain
order of magnitude of violation is necessary in order not
to trivialize the breach and it is not intended to suggest
that any violation of these obligations is not serious or is
somehow excusable. But relatively less serious cases of
646 See, for example, ICJ in Application of the Convention on the
Prevention and Punishment of the Crime of Genocide, Provisional
Measures (footnote 412 above), pp. 439–440; Counter-Claims (footnote
413 above), p. 243; and the District Court of Jerusalem in the
Attorney-General of the Government of Israel v. Adolf Eichmann case,
ILR, vol. 36, p. 5 (1961).
647 Cf. the United States Court of Appeals, Ninth Circuit, in Siderman
de Blake and Others v. The Republic of Argentina and Others, ILR,
vol. 103, p. 455, at p. 471 (1992); the United Kingdom Court of Appeal
in Al Adsani v. Government of Kuwait and Others, ILR, vol. 107,
p. 536, at pp. 540–541 (1996); and the United Kingdom House of Lords
in Pinochet (footnote 415 above), pp. 841 and 881. Cf. the United States
Court of Appeals, Second Circuit, in Filartiga v. Pena-Irala, ILR,
vol. 77, p. 169, at pp. 177–179 (1980).
648 Legality of the Threat or Use of Nuclear Weapons (see footnote
54 above), p. 257, para. 79.
649 East Timor (ibid.). See Declaration on Principles of International
Law concerning Friendly Relations and Cooperation among States in
accordance with the Charter of the United Nations, General Assembly
resolution 2625 (XXV), annex, fifth principle.
breach of peremptory norms can be envisaged, and it is
necessary to limit the scope of this chapter to the more
serious or systematic breaches. Some such limitation is
supported by State practice. For example, when reacting
against breaches of international law, States have often
stressed their systematic, gross or egregious nature. Similarly,
international complaint procedures, for example in
the field of human rights, attach different consequences to
systematic breaches, e.g. in terms of the non-applicability
of the rule of exhaustion of local remedies.650
(8)  To be regarded as systematic, a violation would have
to be carried out in an organized and deliberate way. In
contrast, the term “gross” refers to the intensity of the
violation or its effects; it denotes violations of a flagrant
nature, amounting to a direct and outright assault on the
values protected by the rule. The terms are not of course
mutually exclusive; serious breaches will usually be both
systematic and gross. Factors which may establish the seriousness
of a violation would include the intent to violate
the norm; the scope and number of individual violations;
and the gravity of their consequences for the victims.
It must also be borne in mind that some of the peremptory
norms in question, most notably the prohibitions of
aggression and genocide, by their very nature require an
intentional violation on a large scale.651
(9)  Article 40 does not lay down any procedure for determining
whether or not a serious breach has been committed.
It is not the function of the articles to establish
new institutional procedures for dealing with individual
cases, whether they arise under chapter III of Part Two or
otherwise. Moreover, the serious breaches dealt with in
this chapter are likely to be addressed by the competent
international organizations, including the Security Council
and the General Assembly. In the case of aggression,
the Security Council is given a specific role by the Charter
of the United Nations.
Article 41.  Particular consequences of a serious breach
of an obligation under this chapter
1.  States shall cooperate to bring to an end through
lawful means any serious breach within the meaning of
article 40.
650 See the Ireland v. the United Kingdom case (footnote 236 above),
para. 159; cf., e.g., the procedure established under Economic and
Social Council resolution 1503 (XLVIII), which requires a “consistent
pattern of gross and reliably attested violations of human rights”.
651 At its twenty-second session, the Commission proposed the
following examples as cases denominated as “international crimes”:
“(a)  a serious breach of an international obligation of essential
importance for the maintenance of international peace and security,
such as that prohibiting aggression;
“(b)  a serious breach of an international obligation of essential
importance for safeguarding the right of self-determination of peoples,
such as that prohibiting the establishment or maintenance by
force of colonial domination;
“(c)  a serious breach on a widespread scale of an international
obligation of essential importance for safeguarding the human being,
such as those prohibiting slavery, genocide and apartheid;
“(d)  a serious breach of an international obligation of essential
importance for the safeguarding and preservation of the human
environment, such as those prohibiting massive pollution of the
atmosphere or of the seas.”
Yearbook … 1976, vol. II (Part Two), pp. 95–96.
114	 Report of the International Law Commission on the work of its fifty-third session
2.  No State shall recognize as lawful a situation
created by a serious breach within the meaning of article
40, nor render aid or assistance in maintaining
that situation.
3.  This article is without prejudice to the other
consequences referred to in this Part and to such further
consequences that a breach to which this chapter
applies may entail under international law.
Commentary
(1)  Article 41 sets out the particular consequences of
breaches of the kind and gravity referred to in article 40. It
consists of three paragraphs. The first two prescribe special
legal obligations of States faced with the commission
of “serious breaches” in the sense of article 40, the third
takes the form of a saving clause.
(2)  Pursuant to paragraph 1 of article 41, States are under
a positive duty to cooperate in order to bring to an
end serious breaches in the sense of article 40. Because
of the diversity of circumstances which could possibly be
involved, the provision does not prescribe in detail what
form this cooperation should take. Cooperation could be
organized in the framework of a competent international
organization, in particular the United Nations. However,
paragraph 1 also envisages the possibility of non-institutionalized
cooperation.
(3)  Neither does paragraph 1 prescribe what measures
States should take in order to bring to an end serious
breaches in the sense of article 40. Such cooperation must
be through lawful means, the choice of which will depend
on the circumstances of the given situation. It is, however,
made clear that the obligation to cooperate applies to
States whether or not they are individually affected by the
serious breach. What is called for in the face of serious
breaches is a joint and coordinated effort by all States to
counteract the effects of these breaches. It may be open
to question whether general international law at present
prescribes a positive duty of cooperation, and paragraph 1
in that respect may reflect the progressive development of
international law. But in fact such cooperation, especially
in the framework of international organizations, is carried
out already in response to the gravest breaches of international
law and it is often the only way of providing an
effective remedy. Paragraph 1 seeks to strengthen existing
mechanisms of cooperation, on the basis that all States are
called upon to make an appropriate response to the serious
breaches referred to in article 40.
(4)  Pursuant to paragraph 2 of article 41, States are under
a duty of abstention, which comprises two obligations,
first, not to recognize as lawful situations created by serious
breaches in the sense of article 40 and, secondly, not
to render aid or assistance in maintaining that situation.
(5)  The first of these two obligations refers to the obligation
of collective non-recognition by the international
community as a whole of the legality of situations
resulting directly from serious breaches in the sense of
article 40.652The obligation applies to “situations” created
by these breaches, such as, for example, attempted acquisition
of sovereignty over territory through the denial of
the right of self-determination of peoples. It not only refers
to the formal recognition of these situations, but also
prohibits acts which would imply such recognition.
(6)  The existence of an obligation of non-recognition in
response to serious breaches of obligations arising under
peremptory norms already finds support in international
practice and in decisions of ICJ. The principle that territorial
acquisitions brought about by the use of force are not
valid and must not be recognized found a clear expression
during the Manchurian crisis of 1931–1932, when
the Secretary of State, Henry Stimson, declared that the
United States of America—joined by a large majority of
members of the League of Nations—would not:
admit the legality of any situation de facto nor ... recognize any treaty or
agreement entered into between those Governments, or agents thereof,
which may impair the ... sovereignty, the independence or the territorial
and administrative integrity of the Republic of China, ... [nor] recognize
any situation, treaty or agreement which may be brought about by
means contrary to the covenants and obligations of the Pact of Paris of
August 27, 1928.653
The Declaration on Principles of International Law concerning
Friendly Relations and Cooperation among States
in accordance with the Charter of the United Nations affirms
this principle by stating unequivocally that States
shall not recognize as legal any acquisition of territory
brought about by the use of force.654 As ICJ held in Military
and Paramilitary Activities in and against Nicaragua,
the unanimous consent of States to this declaration
“may be understood as an acceptance of the validity of
the rule or set of rules declared by the resolution by them-
selves”.655
(7)  An example of the practice of non-recognition of
acts in breach of peremptory norms is provided by the
reaction of the Security Council to the Iraqi invasion
of Kuwait in 1990. Following the Iraqi declaration of a
“comprehensive and eternal merger” with Kuwait, the Security
Council, in resolution 662 (1990) of 9August 1990,
decided that the annexation had “no legal validity, and is
considered null and void”, and called upon all States, international
organizations and specialized agencies not to
recognize that annexation and to refrain from any action
or dealing that might be interpreted as a recognition of it,
whether direct or indirect. In fact, no State recognized the
652 This has been described as “an essential legal weapon in the
fight against grave breaches of the basic rules of international law”
(C. Tomuschat, “International crimes by States: an endangered
species?”, International Law: Theory and Practice — Essays in Honour
of Eric Suy, K. Wellens, ed. (The Hague, Martinus Nijhoff, 1998),
p. 253, at p. 259.
653 Secretary of State’s note to the Chinese and Japanese Governments,
in Hackworth, Digest of International Law (Washington,
D.C., United States Government Printing Office, 1940), vol. I, p. 334;
endorsed by Assembly resolutions of 11 March 1932, League of 
Nations Official Journal, March 1932, Special Supplement No. 101,
p. 87. For a review of earlier practice relating to collective nonrecognition,
see J. Dugard, Recognition and the United Nations 
(Cambridge, Grotius, 1987), pp. 24–27.
654 General Assembly resolution 2625 (XXV), annex, first
principle.
655 Military and Paramilitary Activities in and against Nicaragua
(see footnote 36 above), at p. 100, para. 188.
	 State responsibility	 115
legality of the purported annexation, the effects of which
were subsequently reversed.
(8)  As regards the denial by a State of the right of selfdetermination
of peoples, the advisory opinion of ICJ in
the Namibia case is similarly clear in calling for a nonrecognition
of the situation.656 The same obligations are
reflected in the resolutions of the Security Council and
General Assembly concerning the situation in Rhodesia657
and the Bantustans in South Africa.658 These examples
reflect the principle that where a serious breach
in the sense of article 40 has resulted in a situation that
might otherwise call for recognition, this has nonetheless
to be withheld. Collective non-recognition would seem to
be a prerequisite for any concerted community response
against such breaches and marks the minimum necessary
response by States to the serious breaches referred to in
article 40.
(9)  Under article 41, paragraph 2, no State shall recognize
the situation created by the serious breach as lawful.
This obligation applies to all States, including the responsible
State. There have been cases where the responsible
State has sought to consolidate the situation it has created
by its own “recognition”. Evidently, the responsible
State is under an obligation not to recognize or sustain
the unlawful situation arising from the breach. Similar
considerations apply even to the injured State: since the
breach by definition concerns the international community
as a whole, waiver or recognition induced from the
injured State by the responsible State cannot preclude the
international community interest in ensuring a just and
appropriate settlement. These conclusions are consistent
with article 30 on cessation and are reinforced by the peremptory
character of the norms in question.659
(10)  The consequences of the obligation of non-recognition
are, however, not unqualified. In the Namibia advisory
opinion the Court, despite holding that the illegality
of the situation was opposable erga omnes and could not
be recognized as lawful even by States not members of the
United Nations, said that:
the non-recognition of South Africa’s administration of the Territory
should not result in depriving the people of Namibia of any advantages
derived from international cooperation. In particular, while official acts
performed by the Government of South Africa on behalf of or concerning
Namibia after the termination of the Mandate are illegal and invalid,
this invalidity cannot be extended to those acts, such as, for instance, the
registration of births, deaths and marriages, the effects of which can be
ignored only to the detriment of the inhabitants of the Territory.660
656 Namibia case (see footnote 176 above), where the Court held that
“the termination of the Mandate and the declaration of the illegality of
South Africa’s presence in Namibia are opposable to all States in the
sense of barring erga omnes the legality of a situation which is maintained
in violation of international law” (p. 56, para. 126).
657 Cf. Security Council resolution 216 (1965) of 12 November
1965.
658 See, e.g., General Assembly resolution 31/6 A of 26 October
1976, endorsed by the Security Council in its resolution 402 (1976) of
22 December 1976; Assembly resolutions 32/105 N of 14 December
1977 and 34/93 G of 12 December 1979; see also the statements of
21 September 1979 and 15 December 1981 issued by the respective
presidents of the Security Council in reaction to the “creation” of Venda
and Ciskei (S/13549 and S/14794).
659 See also paragraph (7) of the commentary to article 20 and
paragraph (4) of the commentary to article 45.
660 Namibia case (see footnote 176 above), p. 56, para. 125.
Both the principle of non-recognition and this qualification
to it have been applied, for example, by the European
Court of Human Rights.661
(11)  The second obligation contained in paragraph 2
prohibits States from rendering aid or assistance in
maintaining the situation created by a serious breach in
the sense of article 40. This goes beyond the provisions
dealing with aid or assistance in the commission of an
internationally wrongful act, which are covered by article
16. It deals with conduct “after the fact” which assists the
responsible State in maintaining a situation “opposable to
all States in the sense of barring erga omnes the legality
of a situation which is maintained in violation of international
law”.662 It extends beyond the commission of the
serious breach itself to the maintenance of the situation
created by that breach, and it applies whether or not the
breach itself is a continuing one. As to the elements of
“aid or assistance”, article 41 is to be read in connection
with article 16. In particular, the concept of aid or assistance
in article 16 presupposes that the State has “knowledge
of the circumstances of the internationally wrongful
act”. There is no need to mention such a requirement in
article 41, paragraph 2, as it is hardly conceivable that a
State would not have notice of the commission of a serious
breach by another State.
(12)  In some respects, the prohibition contained in paragraph
2 may be seen as a logical extension of the duty
of non-recognition. However, it has a separate scope of
application insofar as actions are concerned which would
not imply recognition of the situation created by serious
breaches in the sense of article 40. This separate existence
is confirmed, for example, in the resolutions of the Security
Council prohibiting any aid or assistance in maintaining
the illegal apartheid regime in South Africa or Portuguese
colonial rule.663 Just as in the case of the duty of
non-recognition, these resolutions would seem to express
a general idea applicable to all situations created by serious
breaches in the sense of article 40.
(13)  Pursuant to paragraph 3, article 41 is without
prejudice to the other consequences elaborated in Part
Two and to possible further consequences that a serious
breach in the sense of article 40 may entail. The purpose
of this paragraph is twofold. First, it makes it clear that
a serious breach in the sense of article 40 entails the legal
consequences stipulated for all breaches in chapters I
and II of Part Two. Consequently, a serious breach in the
sense of article 40 gives rise to an obligation, on behalf of
the responsible State, to cease the wrongful act, to continue
performance and, if appropriate, to give guarantees
and assurances of non-repetition. By the same token, it
entails a duty to make reparation in conformity with the
rules set out in chapter II of this Part. The incidence of
these obligations will no doubt be affected by the gravity
of the breach in question, but this is allowed for in the
actual language of the relevant articles.
661 Loizidou, Merits (see footnote 160 above), p. 2216; Cyprus 
v. Turkey (see footnote 247 above), paras. 89–98.
662 Namibia case (see footnote 176 above), p. 56, para. 126.
663 See, e.g., Security Council resolutions 218 (1965) of 23 November
1965 on the Portuguese colonies, and 418 (1977) of
4 November 1977 and 569 (1985) of 26 July 1985 on South Africa.
116	 Report of the International Law Commission on the work of its fifty-third session
(14)  Secondly, paragraph 3 allows for such further consequences
of a serious breach as may be provided for by
international law. This may be done by the individual primary
rule, as in the case of the prohibition of aggression.
Paragraph 3 accordingly allows that international law may
recognize additional legal consequences flowing from the
commission of a serious breach in the sense of article 40.
The fact that such further consequences are not expressly
referred to in chapter III does not prejudice their recognition
in present-day international law, or their further development.
In addition, paragraph 3 reflects the conviction
that the legal regime of serious breaches is itself in
a state of development. By setting out certain basic legal
consequences of serious breaches in the sense of article
40, article 41 does not intend to preclude the future development
of a more elaborate regime of consequences
entailed by such breaches.
Part Three
THE IMPLEMENTATION OF THE INTERNATIONAL
RESPONSIBILITY OF A STATE
Part Three deals with the implementation of State responsibility,
i.e. with giving effect to the obligations of
cessation and reparation which arise for a responsible State
under Part Two by virtue of its commission of an internationally
wrongful act. Although State responsibility arises
under international law independently of its invocation by
another State, it is still necessary to specify what other
States faced with a breach of an international obligation
may do, what action they may take in order to secure the
performance of the obligations of cessation and reparation
on the part of the responsible State. This, sometimes
referred to as the mise-en-oeuvre of State responsibility,
is the subject matter of Part Three. Part Three consists of
two chapters. Chapter I deals with the invocation of State
responsibility by other States and with certain associated
questions. Chapter II deals with countermeasures taken in
order to induce the responsible State to cease the conduct
in question and to provide reparation.
Chapter I
INVOCATION OF THE RESPONSIBILITY
OF A STATE
Commentary
(1)  Part One of the articles identifies the internationally
wrongful act of a State generally in terms of the breach
of any international obligation of that State. Part Two defines
the consequences of internationally wrongful acts in
the field of responsibility as obligations of the responsible
State, not as rights of any other State, person or entity.
Part Three is concerned with the implementation of State
responsibility, i.e. with the entitlement of other States to
invoke the international responsibility of the responsible
State and with certain modalities of such invocation. The
rights that other persons or entities may have arising from
a breach of an international obligation are preserved by
article 33, paragraph 2.
(2)  Central to the invocation of responsibility is the concept
of the injured State. This is the State whose individual
right has been denied or impaired by the internationally
wrongful act or which has otherwise been particularly
affected by that act. This concept is introduced in article
42 and various consequences are drawn from it in
other articles of this chapter. In keeping with the broad
range of international obligations covered by the articles,
it is necessary to recognize that a broader range of States
may have a legal interest in invoking responsibility and
ensuring compliance with the obligation in question. Indeed,
in certain situations, all States may have such an
interest, even though none of them is individually or
specially affected by the breach.664 This possibility is recognized
in article 48. Articles 42 and 48 are couched in
terms of the entitlement of States to invoke the responsibility
of another State. They seek to avoid problems
arising from the use of possibly misleading terms such
as “direct” versus “indirect” injury or “objective” versus
“subjective” rights.
(3)  Although article 42 is drafted in the singular (“an
injured State”), more than one State may be injured by
an internationally wrongful act and be entitled to invoke
responsibility as an injured State. This is made clear by
article 46. Nor are articles 42 and 48 mutually exclusive.
Situations may well arise in which one State is “injured”
in the sense of article 42, and other States are entitled to
invoke responsibility under article 48.
(4)  Chapter I also deals with a number of related questions:
the requirement of notice if a State wishes to invoke
the responsibility of another (art. 43), certain aspects of
the admissibility of claims (art. 44), loss of the right to invoke
responsibility (art. 45), and cases where the responsibility
of more than one State may be invoked in relation
to the same internationally wrongful act (art. 47).
(5)  Reference must also be made to article 55, which
makes clear the residual character of the articles. In addition
to giving rise to international obligations for States, special
rules may also determine which other State or States are
entitled to invoke the international responsibility arising
from their breach, and what remedies they may seek. This
was true, for example, of article 396 of the Treaty of Versailles,
which was the subject of the decision in the S.S.
“Wimbledon” case.665 It is also true of article 33 of the
European Convention on Human Rights. It will be a matter
of interpretation in each case whether such provisions are
intended to be exclusive, i.e. to apply as a lex specialis.
664 Cf. the statement by ICJ that “all States can be held to have a legal
interest” as concerns breaches of obligations erga omnes, Barcelona
Traction (footnote 25 above), p. 32, para. 33, cited in paragraph (2) of
the commentary to chapter III of Part Two.
665 Four States there invoked the responsibility of Germany, at least
one of which, Japan, had no specific interest in the voyage of the S.S.
“Wimbledon” (see footnote 34 above).
	 State responsibility	 117
Article 42.  Invocation of responsibility
by an injured State
A State is entitled as an injured State to invoke
the responsibility of another State if the obligation
breached is owed to:
(a)	 that State individually; or
(b)	 a group of States including that State, or the
international community as a whole, and the breach
of the obligation:
	 i(i)  specially affects that State; or
	 (ii) is of such a character as radically to change
the position of all the other States to which
the obligation is owed with respect to the
further performance of the obligation.
Commentary
(1)  Article 42 provides that the implementation of State
responsibility is in the first place an entitlement of the
“injured State”. It defines this term in a relatively narrow
way, drawing a distinction between injury to an individual
State or possibly a small number of States and the legal
interests of several or all States in certain obligations established
in the collective interest. The latter are dealt with
in article 48.
(2)  This chapter is expressed in terms of the invocation
by a State of the responsibility of another State. For this
purpose, invocation should be understood as taking measures
of a relatively formal character, for example, the raising
or presentation of a claim against another State or the
commencement of proceedings before an international
court or tribunal. A State does not invoke the responsibility
of another State merely because it criticizes that State
for a breach and calls for observance of the obligation,
or even reserves its rights or protests. For the purpose of
these articles, protest as such is not an invocation of responsibility;
it has a variety of forms and purposes and is
not limited to cases involving State responsibility. There
is in general no requirement that a State which wishes to
protest against a breach of international law by another
State or remind it of its international responsibilities in
respect of a treaty or other obligation by which they are
both bound should establish any specific title or interest to
do so. Such informal diplomatic contacts do not amount
to the invocation of responsibility unless and until they
involve specific claims by the State concerned, such as for
compensation for a breach affecting it, or specific action
such as the filing of an application before a competent international
tribunal,666 or even the taking of countermeasures.
In order to take such steps, i.e. to invoke responsibility
in the sense of the articles, some more specific
entitlement is needed. In particular, for a State to invoke
responsibility on its own account it should have a specific
right to do so, e.g. a right of action specifically conferred
666 An analogous distinction is drawn by article 27, paragraph 2,
of the Convention on the Settlement of Investment Disputes between
States and Nationals of other States, which distinguishes between the
bringing of an international claim in the field of diplomatic protection
and “informal diplomatic exchanges for the sole purpose of facilitating
a settlement of the dispute”.
by a treaty,667 or it must be considered an injured State.
The purpose of article 42 is to define this latter category.
(3)  A State which is injured in the sense of article 42 is
entitled to resort to all means of redress contemplated in
the articles. It can invoke the appropriate responsibility
pursuant to Part Two. It may also—as is clear from the
opening phrase of article 49—resort to countermeasures
in accordance with the rules laid down in chapter II of
this Part. The situation of an injured State should be distinguished
from that of any other State which may be entitled
to invoke responsibility, e.g. under article 48 which
deals with the entitlement to invoke responsibility in some
shared general interest. This distinction is clarified by the
opening phrase of article 42, “A State is entitled as an
injured State to invoke the responsibility”.
(4)  The definition in article 42 is closely modelled on
article 60 of the 1969 Vienna Convention, although the
scope and purpose of the two provisions are different. Article
42 is concerned with any breach of an international
obligation of whatever character, whereas article 60 is
concerned with breach of treaties. Moreover, article 60 is
concerned exclusively with the right of a State party to a
treaty to invoke a material breach of that treaty by another
party as grounds for its suspension or termination. It is not
concerned with the question of responsibility for breach
of the treaty.668 This is why article 60 is restricted to “material”
breaches of treaties. Only a material breach justifies
termination or suspension of the treaty, whereas in the
context of State responsibility any breach of a treaty gives
rise to responsibility irrespective of its gravity. Despite
these differences, the analogy with article 60 is justified.
Article 60 seeks to identify the States parties to a treaty
which are entitled to respond individually and in their own
right to a material breach by terminating or suspending it.
In the case of a bilateral treaty, the right can only be that of
the other State party, but in the case of a multilateral treaty
article 60, paragraph 2, does not allow every other State
to terminate or suspend the treaty for material breach. The
other State must be specially affected by the breach, or at
least individually affected in that the breach necessarily
undermines or destroys the basis for its own further performance
of the treaty.
(5)  In parallel with the cases envisaged in article 60 of
the 1969 Vienna Convention, three cases are identified in
article 42. In the first case, in order to invoke the responsibility
of another State as an injured State, a State must have
an individual right to the performance of an obligation, in
the way that a State party to a bilateral treaty has vis-à-vis
the other State party (subparagraph (a)). Secondly, a State
may be specially affected by the breach of an obligation
to which it is a party, even though it cannot be said that
the obligation is owed to it individually (subparagraph (b)
(i)). Thirdly, it may be the case that performance of the
obligation by the responsible State is a necessary condition
of its performance by all the other States (subparagraph
(b) (ii)); this is the so-called “integral” or “inter-
667 In relation to article 42, such a treaty right could be considered a
lex specialis: see article 55 and commentary.
668 Cf. the 1969 Vienna Convention, art. 73.
118	 Report of the International Law Commission on the work of its fifty-third session
dependent” obligation.669 In each of these cases, the possible
suspension or termination of the obligation or of its
performance by the injured State may be of little value to
it as a remedy. Its primary interest may be in the restoration
of the legal relationship by cessation and reparation.
(6)  Pursuant to subparagraph (a) of article 42, a State is
“injured” if the obligation breached was owed to it individually.
The expression “individually” indicates that in the
circumstances, performance of the obligation was owed
to that State. This will necessarily be true of an obligation
arising under a bilateral treaty between the two States
parties to it, but it will also be true in other cases, e.g. of
a unilateral commitment made by one State to another. It
may be the case under a rule of general international law:
thus, for example, rules concerning the non-navigational
uses of an international river which may give rise to individual
obligations as between one riparian State and another.
Or it may be true under a multilateral treaty where
particular performance is incumbent under the treaty as
between one State party and another. For example, the
obligation of the receiving State under article 22 of the
Vienna Convention on Diplomatic Relations to protect the
premises of a mission is owed to the sending State. Such
cases are to be contrasted with situations where performance
of the obligation is owed generally to the parties to
the treaty at the same time and is not differentiated or individualized.
It will be a matter for the interpretation and
application of the primary rule to determine into which of
the categories an obligation comes. The following discussion
is illustrative only.
(7)  An obvious example of cases coming within the
scope of subparagraph (a) is a bilateral treaty relationship.
If one State violates an obligation the performance
of which is owed specifically to another State, the latter is
an “injured State” in the sense of article 42. Other examples
include binding unilateral acts by which one State assumes
an obligation vis-à-vis another State; or the case of
a treaty establishing obligations owed to a third State not
party to the treaty.670 If it is established that the beneficiaries
of the promise or the stipulation in favour of a third
State were intended to acquire actual rights to performance
of the obligation in question, they will be injured
by its breach. Another example is a binding judgement
of an international court or tribunal imposing obligations
on one State party to the litigation for the benefit of the
other party.671
(8)  In addition, subparagraph (a) is intended to cover
cases where the performance of an obligation under a
multilateral treaty or customary international law is owed
to one particular State. The scope of subparagraph (a)
in this respect is different from that of article 60, paragraph
1, of the 1969 Vienna Convention, which relies on
the formal criterion of bilateral as compared with multilat-
669 The notion of “integral” obligations was developed by Fitzmaurice
as Special Rapporteur on the Law of Treaties: see Yearbook …
1957, vol. II, p. 54. The term has sometimes given rise to confusion,
being used to refer to human rights or environmental obligations which
are not owed on an “all or nothing” basis. The term “interdependent
obligations” may be more appropriate.
670 Cf. the 1969 Vienna Convention, art. 36.
671 See, e.g., Article 59 of the Statute of ICJ.
eral treaties. But although a multilateral treaty will characteristically
establish a framework of rules applicable to
all the States parties, in certain cases its performance in a
given situation involves a relationship of a bilateral character
between two parties. Multilateral treaties of this kind
have often been referred to as giving rise to “ ‘bundles’ of
bilateral relations”.672
(9)  The identification of one particular State as injured
by a breach of an obligation under the Vienna Convention
on Diplomatic Relations does not exclude that all States
parties may have an interest of a general character in compliance
with international law and in the continuation of
international institutions and arrangements which have
been built up over the years. In the United States Diplomatic
and Consular Staff in Tehran case, after referring to
the “fundamentally unlawful character” of the Islamic Republic
of Iran’s conduct in participating in the detention of
the diplomatic and consular personnel, the Court drew:
the attention of the entire international community, of which Iran itself
has been a member since time immemorial, to the irreparable harm that
may be caused by events of the kind now before the Court. Such events
cannot fail to undermine the edifice of law carefully constructed by
mankind over a period of centuries, the maintenance of which is vital
for the security and well-being of the complex international community
of the present day, to which it is more essential than ever that the rules
developed to ensure the ordered progress of relations between its members
should be constantly and scrupulously respected.673
(10)  Although discussion of multilateral obligations
has generally focused on those arising under multilateral
treaties, similar considerations apply to obligations under
rules of customary international law. For example, the
rules of general international law governing the diplomatic
or consular relations between States establish bilateral
relations between particular receiving and sending States,
and violations of these obligations by a particular receiving
State injure the sending State to which performance
was owed in the specific case.
(11)  Subparagraph (b) deals with injury arising from
violations of collective obligations, i.e. obligations that
apply between more than two States and whose performance
in the given case is not owed to one State individually,
but to a group of States or even the international
community as a whole. The violation of these obligations
only injures any particular State if additional requirements
are met. In using the expression “group of States”, article
42, subparagraph (b), does not imply that the group has
any separate existence or that it has separate legal personality.
Rather, the term is intended to refer to a group of
States, consisting of all or a considerable number of States
in the world or in a given region, which have combined
to achieve some collective purpose and which may be
672 See, e.g., K. Sachariew, “State responsibility for multilateral
treaty violations: identifying the ‘injured State’ and its legal status”,
Netherlands International Law Review, vol. 35, No. 3 (1988), p. 273,
at pp. 277–278; B. Simma, “Bilateralism and community interest in the
law of State responsibility”, International Law at a Time of Perplexity:
Essays in Honour of Shabtai Rosenne, Y. Dinstein, ed. (Dordrecht,
Martinus Nijhoff, 1989), p. 821, at p. 823; C. Annacker, “The legal
régime of erga omnes obligations in international law”, Austrian 
Journal of Public and International Law, vol. 46, No. 2 (1994), p. 131,
at p. 136; and D. N. Hutchinson, “Solidarity and breaches of multilateral
treaties”, BYBIL, 1988, vol. 59, p. 151, at pp. 154–155.
673 United States Diplomatic and Consular Staff in Tehran (see footnote
59 above), pp. 41–43, paras. 89 and 92.
	 State responsibility	 119
considered for that purpose as making up a community of
States of a functional character.
(12)  Subparagraph (b) (i) stipulates that a State is injured
if it is “specially affected” by the violation of a collective
obligation. The term “specially affected” is taken
from article 60, paragraph (2) (b), of the 1969 Vienna
Convention. Even in cases where the legal effects of an
internationally wrongful act extend by implication to the
whole group of States bound by the obligation or to the
international community as a whole, the wrongful act may
have particular adverse effects on one State or on a small
number of States. For example a case of pollution of the
high seas in breach of article 194 of the United Nations
Convention on the Law of the Sea may particularly impact
on one or several States whose beaches may be polluted
by toxic residues or whose coastal fisheries may be
closed. In that case, independently of any general interest
of the States parties to the Convention in the preservation
of the marine environment, those coastal States parties
should be considered as injured by the breach. Like article
60, paragraph (2) (b), of the 1969 Vienna Convention,
subparagraph (b) (i) does not define the nature or extent
of the special impact that a State must have sustained in
order to be considered “injured”. This will have to be assessed
on a case-by-case basis, having regard to the object
and purpose of the primary obligation breached and the
facts of each case. For a State to be considered injured,
it must be affected by the breach in a way which distinguishes
it from the generality of other States to which the
obligation is owed.
(13)  In contrast, subparagraph (b) (ii) deals with a special
category of obligations, the breach of which must be
considered as affecting per se every other State to which
the obligation is owed. Article 60, paragraph 2 (c), of the
1969 Vienna Convention recognizes an analogous category
of treaties, viz. those “of such a character that a
material breach of its provisions by one party radically
changes the position of every party with respect to the
further performance of its obligations”. Examples include
a disarmament treaty,674 a nuclear-free zone treaty, or any
other treaty where each party’s performance is effectively
conditioned upon and requires the performance of each
of the others. Under article 60, paragraph 2 (c), any State
party to such a treaty may terminate or suspend it in its
relations not merely with the responsible State but generally
in its relations with all the other parties.
(14)  Essentially, the same considerations apply to obligations
of this character for the purposes of State responsibility.
The other States parties may have no interest in
the termination or suspension of such obligations as distinct
from continued performance, and they must all be
considered as individually entitled to react to a breach.
This is so whether or not any one of them is particularly
affected; indeed they may all be equally affected, and none
may have suffered quantifiable damage for the purposes
of article 36. They may nonetheless have a strong interest
in cessation and in other aspects of reparation, in particular
restitution. For example, if one State party to the Ant-
674 The example given in the commentary of the Commission to what
became article 60: Yearbook … 1966, vol. II, p. 255, document A/6309/
Rev.1, para. (8).
arctic Treaty claims sovereignty over an unclaimed area
of Antarctica contrary to article 4 of that Treaty, the other
States parties should be considered as injured thereby and
as entitled to seek cessation, restitution (in the form of the
annulment of the claim) and assurances of non-repetition
in accordance with Part Two.
(15)  The articles deal with obligations arising under international
law from whatever source and are not confined
to treaty obligations. In practice, interdependent obligations
covered by subparagraph (b) (ii) will usually arise
under treaties establishing particular regimes. Even under
such treaties it may not be the case that just any breach of
the obligation has the effect of undermining the performance
of all the other States involved, and it is desirable that
this subparagraph be narrow in its scope. Accordingly, a
State is only considered injured under subparagraph (b)
(ii) if the breach is of such a character as radically to affect
the enjoyment of the rights or the performance of the
obligations of all the other States to which the obligation
is owed.
Article 43.  Notice of claim by an injured State
1.  An injured State which invokes the responsibility
of another State shall give notice of its claim to that
State.
2.  The injured State may specify in particular:
(a)  the conduct that the responsible State should
take in order to cease the wrongful act, if it is continu-
ing;
(b)  what form reparation should take in accordance
with the provisions of Part Two.
Commentary
(1)  Article 43 concerns the modalities to be observed by
an injured State in invoking the responsibility of another
State. The article applies to the injured State as defined in
article 42, but States invoking responsibility under article
48 must also comply with its requirements.675
(2)  Although State responsibility arises by operation of
law on the commission of an internationally wrongful act
by a State, in practice it is necessary for an injured State
and/or other interested State(s) to respond, if they wish to
seek cessation or reparation. Responses can take a variety
of forms, from an unofficial and confidential reminder
of the need to fulfil the obligation through formal protest,
consultations, etc. Moreover, the failure of an injured
State which has notice of a breach to respond may have legal
consequences, including even the eventual loss of the
right to invoke responsibility by waiver or acquiescence:
this is dealt with in article 45.
(3)  Article 43 requires an injured State which wishes to
invoke the responsibility of another State to give notice of
its claim to that State. It is analogous to article 65 of the
1969 Vienna Convention. Notice under article 43 need not
675 See article 48, paragraph (3), and commentary.
120	 Report of the International Law Commission on the work of its fifty-third session
be in writing, nor is it a condition for the operation of the
obligation to provide reparation. Moreover, the requirement
of notification of the claim does not imply that the
normal consequence of the non-performance of an international
obligation is the lodging of a statement of claim.
Nonetheless, an injured or interested State is entitled to
respond to the breach and the first step should be to call
the attention of the responsible State to the situation, and
to call on it to take appropriate steps to cease the breach
and to provide redress.
(4)  It is not the function of the articles to specify in detail
the form which an invocation of responsibility should
take. In practice, claims of responsibility are raised at different
levels of government, depending on their seriousness
and on the general relations between the States concerned.
In the Certain Phosphate Lands in Nauru case,
Australia argued that Nauru’s claim was inadmissible
because it had “not been submitted within a reasonable
time”.676 The Court referred to the fact that the claim had
been raised, and not settled, prior to Nauru’s independence
in 1968, and to press reports that the claim had been mentioned
by the new President of Nauru in his independence
day speech, as well as, inferentially, in subsequent correspondence
and discussions with Australian Ministers.
However, the Court also noted that:
It was only on 6 October 1983 that the President of Nauru wrote to
the Prime Minister of Australia requesting him to “seek a sympathetic
reconsideration of Nauru’s position”. 677
The Court summarized the communications between the
parties as follows:
The Court … takes note of the fact that Nauru was officially informed,
at the latest by letter of 4 February 1969, of the position of Australia on
the subject of rehabilitation of the phosphate lands worked out before
1 July 1967. Nauru took issue with that position in writing only on
6 October 1983. In the meantime, however, as stated by Nauru and
not contradicted by Australia, the question had on two occasions been
raised by the President of Nauru with the competent Australian authorities.
The Court considers that, given the nature of relations between
Australia and Nauru, as well as the steps thus taken, Nauru’s Application
was not rendered inadmissible by passage of time. 678
In the circumstances, it was sufficient that the respondent
State was aware of the claim as a result of communications
from the claimant, even if the evidence of those communications
took the form of press reports of speeches or meetings
rather than of formal diplomatic correspondence.
(5)  When giving notice of a claim, an injured or interested
State will normally specify what conduct in its view
is required of the responsible State by way of cessation of
any continuing wrongful act, and what form any reparation
should take. Thus, paragraph 2 (a) provides that the
injured State may indicate to the responsible State what
should be done in order to cease the wrongful act, if it is
continuing. This indication is not, as such, binding on the
responsible State. The injured State can only require the
responsible State to comply with its obligations, and the
legal consequences of an internationally wrongful act are
not for the injured State to stipulate or define. But it may
be helpful to the responsible State to know what would
676 Certain Phosphate Lands in Nauru, Preliminary Objections
(see footnote 230 above), p. 253, para. 31.
677 Ibid., p. 254, para. 35.
678 Ibid., pp. 254–255, para. 36.
satisfy the injured State; this may facilitate the resolution
of the dispute.
(6)  Paragraph 2 (b) deals with the question of the election
of the form of reparation by the injured State. In general,
an injured State is entitled to elect as between the
available forms of reparation. Thus, it may prefer compensation
to the possibility of restitution, as Germany did
in the Factory at Chorzów case,679 or as Finland eventually
chose to do in its settlement of the Passage through the
Great Belt case.680 Or it may content itself with declaratory
relief, generally or in relation to a particular aspect
of its claim. On the other hand, there are cases where a
State may not, as it were, pocket compensation and walk
away from an unresolved situation, for example one involving
the life or liberty of individuals or the entitlement
of a people to their territory or to self-determination. In
particular, insofar as there are continuing obligations the
performance of which are not simply matters for the two
States concerned, those States may not be able to resolve
the situation by a settlement, just as an injured State may
not be able on its own to absolve the responsible State
from its continuing obligations to a larger group of States
or to the international community as a whole.
(7)  In the light of these limitations on the capacity of the
injured State to elect the preferred form of reparation, article
43 does not set forth the right of election in an absolute
form. Instead, it provides guidance to an injured State as
to what sort of information it may include in its notification
of the claim or in subsequent communications.
Article 44.  Admissibility of claims
The responsibility of a State may not be invoked if:
(a)  the claim is not brought in accordance with any
applicable rule relating to the nationality of claims;
(b)  the claim is one to which the rule of exhaustion
of local remedies applies and any available and effective
local remedy has not been exhausted.
Commentary
(1)  The present articles are not concerned with questions
of the jurisdiction of international courts and tribunals,
or in general with the conditions for the admissibility
of cases brought before such courts or tribunals. Rather,
they define the conditions for establishing the international
responsibility of a State and for the invocation of
679 As PCIJ noted in the Factory at Chorzów, Jurisdiction (see footnote
34 above), by that stage of the dispute, Germany was no longer
seeking on behalf of the German companies concerned the return of the
factory in question or of its contents (p. 17).
680 In the Passage through the Great Belt (Finland v. Denmark),
Provisional Measures, Order of 29 July 1991, I.C.J. Reports 1991,
p. 12, ICJ did not accept Denmark’s argument as to the impossibility
of restitution if, on the merits, it was found that the construction of the
bridge across the Great Belt would result in a violation of Denmark’s
international obligations. For the terms of the eventual settlement, see
M. Koskenniemi, “L’affaire du passage par le Grand-Belt”, Annuaire
français de droit international, vol. 38 (1992), p. 905, at p. 940.
	 State responsibility	 121
that responsibility by another State or States. Thus, it is
not the function of the articles to deal with such questions
as the requirement for exhausting other means of peaceful
settlement before commencing proceedings, or such
doctrines as litispendence or election as they may affect
the jurisdiction of one international tribunal vis-à-vis another.681
By contrast, certain questions which would be
classified as questions of admissibility when raised before
an international court are of a more fundamental character.
They are conditions for invoking the responsibility of
a State in the first place. Two such matters are dealt with
in article 44: the requirements of nationality of claims and
exhaustion of local remedies.
(2)  Subparagraph (a) provides that the responsibility of
a State may not be invoked other than in accordance with
any applicable rule relating to the nationality of claims.
As PCIJ said in the Mavrommatis Palestine Concessions
case:
It is an elementary principle of international law that a State is entitled
to protect its subjects, when injured by acts contrary to international
law committed by another State, from whom they have been unable to
obtain satisfaction through the ordinary channels.682
Subparagraph (a) does not attempt a detailed elaboration
of the nationality of claims rule or of the exceptions to
it. Rather, it makes it clear that the nationality of claims
rule is not only relevant to questions of jurisdiction or the
admissibility of claims before judicial bodies, but is also
a general condition for the invocation of responsibility in
those cases where it is applicable.683
(3)  Subparagraph (b) provides that when the claim is
one to which the rule of exhaustion of local remedies applies,
the claim is inadmissible if any available and effective
local remedy has not been exhausted. The paragraph
is formulated in general terms in order to cover any case
to which the exhaustion of local remedies rule applies,
whether under treaty or general international law, and in
spheres not necessarily limited to diplomatic protection.
(4)  The local remedies rule was described by a Chamber
of the Court in the ELSI case as “an important principle of
customary international law”.684 In the context of a claim
681 For discussion of the range of considerations affecting jurisdiction
and admissibility of international claims before courts, see G.
Abi-Saab, Les exceptions préliminaires dans la procédure de la Cour
internationale (Paris, Pedone, 1967); Sir Gerald Fitzmaurice, The
Law and Procedure of the International Court of Justice (Cambridge,
Grotius, 1986), vol. 2, pp. 427–575; and S. Rosenne, The Law and
Practice of the International Court, 1920–1996, 3rd ed. (The Hague,
Martinus Nijhoff, 1997), vol. II, Jurisdiction.
682 Mavrommatis (see footnote 236 above), p. 12.
683 Questions of nationality of claims will be dealt with in detail in
the work of the Commission on diplomatic protection. See first report
of the Special Rapporteur for the topic “Diplomatic protection” in
Yearbook … 2000, vol. II (Part One), document A/CN.4/506 and
Add.1.
684 ELSI (see footnote 85 above), p. 42, para. 50. See also Interhandel,
Preliminary Objections, I.C.J. Reports 1959, p. 6, at p. 27. On the
exhaustion of local remedies rule generally, see, e.g., C. F. Amerasinghe,
Local Remedies in International Law (Cambridge, Grotius, 1990);
J. Chappez, La règle de l’épuisement des voies de recours internes
(Paris, Pedone, 1972); K. Doehring, “Local remedies, exhaustion of”,
Encyclopedia of Public International Law, R. Bernhardt, ed. (footnote
409 above), vol. 3, pp. 238–242; and G. Perrin, “La naissance de la responsabilité
internationale et l’épuisement des voies de recours internes
brought on behalf of a corporation of the claimant State,
the Chamber defined the rule succinctly in the following
terms:
for an international claim [sc. on behalf of individual nationals or corporations]
to be admissible, it is sufficient if the essence of the claim
has been brought before the competent tribunals and pursued as far as
permitted by local law and procedures, and without success.685
The Chamber thus treated the exhaustion of local remedies
as being distinct, in principle, from “the merits of
the case”.686
(5)  Only those local remedies which are “available and
effective” have to be exhausted before invoking the responsibility
of a State. The mere existence on paper of
remedies under the internal law of a State does not impose
a requirement to make use of those remedies in
every case. In particular, there is no requirement to use a
remedy which offers no possibility of redressing the situation,
for instance, where it is clear from the outset that
the law which the local court would have to apply can lead
only to the rejection of any appeal. Beyond this, article
44, subparagraph (b), does not attempt to spell out comprehensively
the scope and content of the exhaustion of
local remedies rule, leaving this to the applicable rules of
international law.687
Article 45.  Loss of the right to invoke responsibility
The responsibility of a State may not be invoked if:
(a)  the injured State has validly waived the claim;
(b)  the injured State is to be considered as having,
by reason of its conduct, validly acquiesced in the lapse
of the claim.
Commentary
(1)  Article 45 is analogous to article 45 of the 1969 Vienna
Convention concerning loss of the right to invoke a
ground for invalidating or terminating a treaty. The article
deals with two situations in which the right of an injured
State or other States concerned to invoke the responsibility
of a wrongdoing State may be lost: waiver and acquiescence
in the lapse of the claim. In this regard, the position
of an injured State as referred to in article 42 and other
States concerned with a breach needs to be distinguished.
A valid waiver or settlement of the responsibility dispute
dans le projet d’articles de la Commission du droit international”,
Festschrift für Rudolf Bindschedler (Bern, Stämpfli, 1980), p. 271.
On the exhaustion of local remedies rule in relation to violations of
human rights obligations, see, e.g., A. A. Cançado Trindade, The Application
of the Rule of Exhaustion of Local Remedies in International
Law: Its Rationale in the International Protection of Individual Rights
(Cambridge University Press, 1983); and E. Wyler, L’illicite et la condition
des personnes privées (Paris, Pedone, 1995), pp. 65–89.
685 ELSI (see footnote 85 above), p. 46, para. 59.
686 Ibid., p. 48, para. 63.
687 The topic will be dealt with in detail in the work of the Commission
on diplomatic protection. See second report of the Special Rapporteur
on diplomatic protection in Yearbook … 2001, vol. II (Part One),
document A/CN.4/514.
122	 Report of the International Law Commission on the work of its fifty-third session
between the responsible State and the injured State, or,
if there is more than one, all the injured States, may preclude
any claim for reparation. Positions taken by individual
States referred to in article 48 will not have such
an effect.
(2)  Subparagraph (a) deals with the case where an injured
State has waived either the breach itself, or its consequences
in terms of responsibility. This is a manifestation
of the general principle of consent in relation to rights or
obligations within the dispensation of a particular State.
(3)  In some cases, the waiver may apply only to one aspect
of the legal relationship between the injured State and
the responsible State. For example, in the Russian Indemnity
case, the Russian embassy had repeatedly demanded
from Turkey a certain sum corresponding to the capital
amount of a loan, without any reference to interest or
damages for delay. Turkey having paid the sum demanded,
the tribunal held that this conduct amounted to the abandonment
of any other claim arising from the loan.688
(4)  A waiver is only effective if it is validly given. As
with other manifestations of State consent, questions of
validity can arise with respect to a waiver, for example,
possible coercion of the State or its representative, or a
material error as to the facts of the matter, arising perhaps
from a misrepresentation of those facts by the responsible
State. The use of the term “valid waiver” is intended to
leave to the general law the question of what amounts to
a valid waiver in the circumstances.689 Of particular significance
in this respect is the question of consent given
by an injured State following a breach of an obligation
arising from a peremptory norm of general international
law, especially one to which article 40 applies. Since such
a breach engages the interest of the international community
as a whole, even the consent or acquiescence of the
injured State does not preclude that interest from being
expressed in order to ensure a settlement in conformity
with international law.
(5)  Although it may be possible to infer a waiver from
the conduct of the States concerned or from a unilateral
statement, the conduct or statement must be unequivocal.
In the Certain Phosphate Lands in Nauru case, it was
argued that the Nauruan authorities before independence
had waived the rehabilitation claim by concluding an
agreement relating to the future of the phosphate industry
as well as by statements made at the time of independence.
As to the former, the record of negotiations showed
that the question of waiving the rehabilitation claim had
been raised and not accepted, and the Agreement itself
was silent on the point. As to the latter, the relevant statements
were unclear and equivocal. The Court held there
had been no waiver, since the conduct in question “did
not at any time effect a clear and unequivocal waiver of
their claims”.690 In particular, the statements relied on
“[n]otwithstanding some ambiguity in the wording …
did not imply any departure from the point of view ex-
688 Russian Indemnity (see footnote 354 above), p. 446.
689 Cf. the position with respect to valid consent under article 20: see
paragraphs (4) to (8) of the commentary to article 20.
690 Certain Phosphate Lands in Nauru, Preliminary Objections (see
footnote 230 above), p. 247, para. 13.
pressed clearly and repeatedly by the representatives of
the Nauruan people before various organs of the United
Nations”.691
(6)  Just as it may explicitly waive the right to invoke
responsibility, so an injured State may acquiesce in the
loss of that right. Subparagraph (b) deals with the case
where an injured State is to be considered as having, by
reason of its conduct, validly acquiesced in the lapse of
the claim. The article emphasizes conduct of the State,
which could include, where applicable, unreasonable delay,
as the determining criterion for the lapse of the claim.
Mere lapse of time without a claim being resolved is not,
as such, enough to amount to acquiescence, in particular
where the injured State does everything it can reasonably
do to maintain its claim.
(7)  The principle that a State may by acquiescence lose
its right to invoke responsibility was endorsed by ICJ in
the Certain Phosphate Lands in Nauru case, in the following
passage:
The Court recognizes that, even in the absence of any applicable treaty
provision, delay on the part of a claimant State may render an application
inadmissible. It notes, however, that international law does not lay
down any specific time limit in that regard. It is therefore for the Court
to determine in the light of the circumstances of each case whether the
passage of time renders an application inadmissible.692
In the LaGrand case, the Court held the German application
admissible even though Germany had taken legal
action some years after the breach had become known
to it.693
(8)  One concern of the rules relating to delay is that additional
difficulties may be caused to the respondent State
due to the lapse of time, e.g. as concerns the collection
and presentation of evidence. Thus, in the Stevenson case
and the Gentini case, considerations of procedural fairness
to the respondent State were advanced.694 In contrast, the
plea of delay has been rejected if, in the circumstances of
a case, the respondent State could not establish the existence
of any prejudice on its part, as where it has always
had notice of the claim and was in a position to collect and
preserve evidence relating to it.695
(9)  Moreover, contrary to what may be suggested by
the expression “delay”, international courts have not engaged
simply in measuring the lapse of time and applying
clear-cut time limits. No generally accepted time limit,
691 Ibid., p. 250, para. 20.
692 Ibid., pp. 253–254, para. 32. The Court went on to hold that,
in the circumstances of the case and having regard to the history of
the matter, Nauru’s application was not inadmissible on this ground
(para. 36). It reserved for the merits any question of prejudice to the
respondent State by reason of the delay. See further paragraph (8) of the
commentary to article 13.
693 LaGrand, Provisional Measures (see footnote 91 above)
and LaGrand, Judgment (see footnote 119 above), at pp. 486–487,
paras. 53–57.
694 See Stevenson, UNRIAA, vol. IX (Sales No. 59.V.5), p. 385
(1903); and Gentini, ibid., vol. X (Sales No. 60.V.4), p. 551 (1903).
695 See, e.g., Tagliaferro, UNRIAA, vol. X (Sales No. 60.V.4),
p. 592, at p. 593 (1903); see also the actual decision in Stevenson
(footnote 694 above), pp. 386–387.
	 State responsibility	 123
expressed in terms of years, has been laid down.696 The
Swiss Federal Department in 1970 suggested a period
of 20 to 30 years since the coming into existence of the
claim.697 Others have stated that the requirements were
more exacting for contractual claims than for non-contractual
claims.698 None of the attempts to establish any
precise or finite time limit for international claims in general
has achieved acceptance.699 It would be very difficult
to establish any single limit, given the variety of situations,
obligations and conduct that may be involved.
(10)  Once a claim has been notified to the respondent
State, delay in its prosecution (e.g. before an international
tribunal) will not usually be regarded as rendering it inadmissible.700
Thus, in the Certain Phosphate Lands in
Nauru case, ICJ held it to be sufficient that Nauru had referred
to its claims in bilateral negotiations with Australia
in the period preceding the formal institution of legal
proceedings in 1989.701 In the Tagliaferro case, Umpire
Ralston likewise held that, despite the lapse of 31 years
since the infliction of damage, the claim was admissible
as it had been notified immediately after the injury had
occurred.702
(11)  To summarize, a claim will not be inadmissible on
grounds of delay unless the circumstances are such that
the injured State should be considered as having acquiesced
in the lapse of the claim or the respondent State
has been seriously disadvantaged. International courts
generally engage in a flexible weighing of relevant circumstances
in the given case, taking into account such
matters as the conduct of the respondent State and the
importance of the rights involved. The decisive factor is
whether the respondent State has suffered any prejudice
as a result of the delay in the sense that the respondent
could have reasonably expected that the claim would no
longer be pursued. Even if there has been some prejudice,
it may be able to be taken into account in determining the
form or extent of reparation.703
696 In some cases time limits are laid down for specific categories of
claims arising under specific treaties (e.g. the six-month time limit for
individual applications under article 35, paragraph 1, of the European
Convention on Human Rights) notably in the area of private law (e.g.
in the field of commercial transactions and international transport). See
the Convention on the Limitation Period in the International Sale of
Goods, as amended by the Protocol to the Convention. By contrast, it is
highly unusual for treaty provisions dealing with inter-State claims to
be subject to any express time limits.
697 Communiqué of 29 December 1970, in Annuaire suisse de droit
international, vol. 32 (1976), p. 153.
698 C.-A. Fleischhauer, “Prescription”, Encyclopedia of Public International
Law (see footnote 409 above), vol. 3, p. 1105, at p. 1107.
699 A large number of international decisions stress the absence of
general rules, and in particular of any specific limitation period measured
in years. Rather, the principle of delay is a matter of appreciation
having regard to the facts of the given case. Besides Certain Phosphate
Lands in Nauru (footnotes 230 and 232 above), see, e.g. Gentini (footnote
694 above), p. 561; and the Ambatielos arbitration, ILR, vol. 23,
p. 306, at pp. 314–317 (1956).
700 For statements of the distinction between notice of claim and
commencement of proceedings, see, e.g. R. Jennings andA. Watts, eds.,
Oppenheim’s International Law, 9th ed. (Harlow, Longman, 1992),
vol. I, Peace, p. 527; and C. Rousseau, Droit international public (Paris,
Sirey, 1983), vol. V, p. 182.
701 Certain Phosphate Lands in Nauru, Preliminary Objections
(see footnote 230 above), p. 250, para. 20.
702 Tagliaferro (see footnote 695 above), p. 593.
703 See article 39 and commentary.
Article 46.  Plurality of injured States
Where several States are injured by the same internationally
wrongful act, each injured State may separately
invoke the responsibility of the State which has
committed the internationally wrongful act.
Commentary
(1)  Article 46 deals with the situation of a plurality of
injured States, in the sense defined in article 42. It states
the principle that where there are several injured States,
each of them may separately invoke the responsibility for
the internationally wrongful act on its own account.
(2)  Several States may qualify as “injured” States under
article 42. For example, all the States to which an interdependent
obligation is owed within the meaning of article
42, subparagraph (b) (ii), are injured by its breach. In a
situation of a plurality of injured States, each may seek
cessation of the wrongful act if it is continuing, and claim
reparation in respect of the injury to itself. This conclusion
has never been doubted, and is implicit in the terms
of article 42 itself.
(3)  It is by no means unusual for claims arising from
the same internationally wrongful act to be brought by
several States. For example, in the S.S. “Wimbledon”
case, four States brought proceedings before PCIJ under
article 386, paragraph 1, of the Treaty of Versailles,
which allowed “any interested Power” to apply in the
event of a violation of the provisions of the Treaty concerning
transit through the Kiel Canal. The Court noted
that “each of the four Applicant Powers has a clear interest
in the execution of the provisions relating to the Kiel
Canal, since they all possess fleets and merchant vessels
flying their respective flags”. It held they were each covered
by article 386, paragraph 1, “even though they may
be unable to adduce a prejudice to any pecuniary interest”.704
In fact, only France, representing the operator of
the vessel, claimed and was awarded compensation. In
the cases concerning the Aerial Incident of 27 July 1955,
proceedings were commenced by the United States, the
United Kingdom and Israel against Bulgaria concerning
the destruction of an Israeli civil aircraft and the loss of
lives involved.705 In the Nuclear Tests cases, Australia
and New Zealand each claimed to be injured in various
ways by the French conduct of atmospheric nuclear tests
at Mururoa Atoll.706
(4)  Where the States concerned do not claim compensation
on their own account as distinct from a declaration
704 S.S. “Wimbledon” (see footnote 34 above), p. 20.
705 ICJ held that it lacked jurisdiction over the Israeli claim: Aerial
Incident of 27 July 1955 (Israel v. Bulgaria), Judgment, I.C.J. Reports
1959, p. 131, after which the United Kingdom and United States claims
were withdrawn. In its Memorial, Israel noted that there had been active
coordination of the claims between the various claimant Governments,
and added: “One of the primary reasons for establishing coordination
of this character from the earliest stages was to prevent, so far as was
possible, the Bulgarian Government being faced with double claims
leading to the possibility of double damages” (see footnote 363 above),
p. 106.
706 See Nuclear Tests (Australia v. France) and (New Zealand 
v. France) (footnote 196 above), pp. 256 and 460, respectively.
124	 Report of the International Law Commission on the work of its fifty-third session
of the legal situation, it may not be clear whether they are
claiming as injured States or as States invoking responsibility
in the common or general interest under article
48. Indeed, in such cases it may not be necessary to decide
into which category they fall, provided it is clear that
they fall into one or the other. Where there is more than
one injured State claiming compensation on its own account
or on account of its nationals, evidently each State
will be limited to the damage actually suffered. Circumstances
might also arise in which several States injured by
the same act made incompatible claims. For example, one
State may claim restitution whereas the other may prefer
compensation. If restitution is indivisible in such a case
and the election of the second State is valid, it may be that
compensation is appropriate in respect of both claims.707
In any event, two injured States each claiming in respect
of the same wrongful act would be expected to coordinate
their claims so as to avoid double recovery. As ICJ pointed
out in its advisory opinion on Reparation for Injuries, “International
tribunals are already familiar with the problem
of a claim in which two or more national States are interested,
and they know how to protect the defendant State
in such a case”.708
Article 47.  Plurality of responsible States
1.  Where several States are responsible for the
same internationally wrongful act, the responsibility
of each State may be invoked in relation to that act.
2.  Paragraph 1:
(a)  does not permit any injured State to recover, by
way of compensation, more than the damage it has suf-
fered;
(b)  is without prejudice to any right of recourse
against the other responsible States.
Commentary
(1)  Article 47 deals with the situation where there is
a plurality of responsible States in respect of the same
wrongful act. It states the general principle that in such
cases each State is separately responsible for the conduct
attributable to it, and that responsibility is not diminished
or reduced by the fact that one or more other States are
also responsible for the same act.
(2)  Several States may be responsible for the same internationally
wrongful act in a range of circumstances. For
example, two or more States might combine in carrying
out together an internationally wrongful act in circumstances
where they may be regarded as acting jointly in respect
of the entire operation. In that case the injured State
can hold each responsible State to account for the wrongful
conduct as a whole. Or two States may act through a
707 Cf. Forests of Central Rhodopia, where the arbitrator declined to
award restitution, inter alia, on the ground that not all the persons or
entities interested in restitution had claimed (see footnote 382 above),
p. 1432.
708 Reparation for Injuries (see footnote 38 above), p. 186.
common organ which carries out the conduct in question,
e.g. a joint authority responsible for the management of a
boundary river. Or one State may direct and control another
State in the commission of the same internationally
wrongful act by the latter, such that both are responsible
for the act.709
(3)  It is important not to assume that internal law concepts
and rules in this field can be applied directly to international
law. Terms such as “joint”, “joint and several”
and “solidary” responsibility derive from different legal
traditions710 and analogies must be applied with care. In
international law, the general principle in the case of a
plurality of responsible States is that each State is separately
responsible for conduct attributable to it in the
sense of article 2. The principle of independent responsibility
reflects the position under general international law,
in the absence of agreement to the contrary between the
States concerned.711 In the application of that principle,
however, the situation can arise where a single course of
conduct is at the same time attributable to several States
and is internationally wrongful for each of them. It is to
such cases that article 47 is addressed.
(4)  In the Certain Phosphate Lands in Nauru case,712
Australia, the sole respondent, had administered Nauru
as a trust territory under the Trusteeship Agreement on
behalf of the three States concerned. Australia argued that
it could not be sued alone by Nauru, but only jointly with
the other two States concerned. Australia argued that the
two States were necessary parties to the case and that in
accordance with the principle formulated in Monetary
Gold,713 the claim against Australia alone was inadmissible.
It also argued that the responsibility of the three
States making up the Administering Authority was “solidary”
and that a claim could not be made against only
one of them. The Court rejected both arguments. On the
question of “solidary” responsibility it said:
Australia has raised the question whether the liability of the three States
would be “joint and several” (solidaire), so that any one of the three
would be liable to make full reparation for damage flowing from any
breach of the obligations of theAdministeringAuthority, and not merely
a one-third or some other proportionate share. This … is independent of
the question whether Australia can be sued alone. The Court does not
consider that any reason has been shown why a claim brought against
only one of the three States should be declared inadmissible in limine
litis merely because that claim raises questions of the administration
of the Territory, which was shared with two other States. It cannot be
denied that Australia had obligations under the Trusteeship Agreement,
in its capacity as one of the three States forming the Administering Authority,
and there is nothing in the character of that Agreement which
debars the Court from considering a claim of a breach of those obligations
by Australia.714
The Court was careful to add that its decision on jurisdiction
“does not settle the question whether reparation
709 See article 17 and commentary.
710 For a comparative survey of internal laws on solidary or joint
liability, see T. Weir, loc. cit. (footnote 471 above), vol. XI, especially
pp. 43–44, sects. 79–81.
711 See paragraphs (1) to (5) of the introductory commentary to
chapter IV of Part One.
712 See footnote 230 above.
713 See footnote 286 above. See also paragraph (11) of the commentary
to article 16.
714 Certain Phosphate Lands in Nauru, Preliminary Objections 
(see footnote 230 above), pp. 258–259, para. 48.
	 State responsibility	 125
would be due from Australia, if found responsible, for
the whole or only for part of the damage Nauru alleges it
has suffered, regard being had to the characteristics of the
Mandate and Trusteeship Systems … and, in particular,
the special role played by Australia in the administration
of the Territory”.715
(5)  The extent of responsibility for conduct carried on
byanumberofStatesissometimesaddressedintreaties.716
A well-known example is the Convention on International
Liability for Damage Caused by Space Objects. Article
IV, paragraph 1, provides expressly for “joint and several
liability” where damage is suffered by a third State as a
result of a collision between two space objects launched
by two States. In some cases liability is strict; in others it
is based on fault. Article IV, paragraph 2, provides:
In all cases of joint and several liability referred to in paragraph 1 …
the burden of compensation for the damage shall be apportioned between
the first two States in accordance with the extent to which they
were at fault; if the extent of the fault of each of these States cannot be
established, the burden of compensation shall be apportioned equally
between them. Such apportionment shall be without prejudice to the
right of the third State to seek the entire compensation due under this
Convention from any or all of the launching States which are jointly
and severally liable.717
This is clearly a lex specialis, and it concerns liability for
lawful conduct rather than responsibility in the sense of
the present articles.718 At the same time, it indicates what
a regime of “joint and several” liability might amount to
so far as an injured State is concerned.
(6)  According to paragraph 1 of article 47, where several
States are responsible for the same internationally
wrongful act, the responsibility of each State may be invoked
in relation to that act. The general rule in international
law is that of separate responsibility of a State for
its own wrongful acts and paragraph 1 reflects this general
rule. Paragraph 1 neither recognizes a general rule
of joint and several responsibility, nor does it exclude the
possibility that two or more States will be responsible for
the same internationally wrongful act. Whether this is so
will depend on the circumstances and on the international
obligations of each of the States concerned.
(7)  Under paragraph 1 of article 47, where several States
are each responsible for the same internationally wrongful
act, the responsibility of each may be separately invoked
by an injured State in the sense of article 42. The conse-
715 Ibid., p. 262, para. 56. The case was subsequently withdrawn
by agreement, Australia agreeing to pay by instalments an amount
corresponding to the full amount of Nauru’s claim. Subsequently, the
two other Governments agreed to contribute to the payments made
under the settlement. See Certain Phosphate Lands in Nauru, Order
(footnote 232 above) and the settlement agreement (ibid.).
716 A special case is the responsibility of the European Union and its
member States under “mixed agreements”, where the Union and all or
some members are parties in their own name. See, e.g., annex IX to the
United Nations Convention on the Law of the Sea. Generally on mixed
agreements, see, e.g., A. Rosas, “Mixed Union mixed agreements”,
International Law Aspects of the European Union, M. Koskenniemi,
ed. (The Hague, Kluwer, 1998), p. 125.
717 See also article V, paragraph 2, which provides for indemnification
between States which are jointly and severally liable.
718 See paragraph 4 of the general commentary for the distinction
between international responsibility for wrongful acts and international
liability arising from lawful conduct.
quences that flow from the wrongful act, for example in
terms of reparation, will be those which flow from the
provisions of Part Two in relation to that State.
(8)  Article 47 only addresses the situation of a plurality
of responsible States in relation to the same internationally
wrongful act. The identification of such an act will
depend on the particular primary obligation, and cannot
be prescribed in the abstract. Of course, situations can
also arise where several States by separate internationally
wrongful conduct have contributed to causing the same
damage. For example, several States might contribute to
polluting a river by the separate discharge of pollutants.
In the Corfu Channel incident, it appears that Yugoslavia
actually laid the mines and would have been responsible
for the damage they caused. ICJ held that Albania was
responsible to the United Kingdom for the same damage
on the basis that it knew or should have known of the presence
of the mines and of the attempt by the British ships to
exercisetheirrightoftransit,butfailedtowarntheships.719
Yet, it was not suggested that Albania’s responsibility for
failure to warn was reduced, let alone precluded, by reason
of the concurrent responsibility of a third State. In
such cases, the responsibility of each participating State
is determined individually, on the basis of its own conduct
and by reference to its own international obligations.
(9)  The general principle set out in paragraph 1 of article
47 is subject to the two provisos set out in paragraph
2. Subparagraph (a) addresses the question of
double recovery by the injured State. It provides that
the injured State may not recover, by way of compensation,
more than the damage suffered.720 This provision is
designed to protect the responsible States, whose obligation
to compensate is limited by the damage suffered.
The principle is only concerned to ensure against the
actual recovery of more than the amount of the damage.
It would not exclude simultaneous awards against two or
more responsible States, but the award would be satisfied
so far as the injured State is concerned by payment in full
made by any one of them.
(10)  The second proviso, in subparagraph (b), recognizes
that where there is more than one responsible State
in respect of the same injury, questions of contribution
may arise between them. This is specifically envisaged,
for example, in articles IV, paragraph 2, and V, paragraph
2, of the Convention on International Liability for
Damage Caused by Space Objects. On the other hand,
there may be cases where recourse by one responsible
State against another should not be allowed. Subparagraph
(b) does not address the question of contribution
among several States which are responsible for the same
wrongful act; it merely provides that the general principle
stated in paragraph 1 is without prejudice to any right of
recourse which one responsible State may have against
any other responsible State.
719 Corfu Channel, Merits (see footnote 35 above), pp. 22–23.
720 Such a principle was affirmed, for example, by PCIJ in the
Factory at Chorzów, Merits case (see footnote 34 above), when it
held that a remedy sought by Germany could not be granted “or the
same compensation would be awarded twice over” (p. 59); see also
pp. 45 and 49.
126	 Report of the International Law Commission on the work of its fifty-third session
Article 48.  Invocation of responsibility
by a State other than an injured State
1.  Any State other than an injured State is entitled
to invoke the responsibility of another State in accordance
with paragraph 2 if:
(a)  the obligation breached is owed to a group of
States including that State, and is established for the
protection of a collective interest of the group; or
(b)  the obligation breached is owed to the international
community as a whole.
2.  Any State entitled to invoke responsibility under
paragraph 1 may claim from the responsible State:
(a)  cessation of the internationally wrongful act,
and assurances and guarantees of non-repetition in
accordance with article 30; and
(b)  performance of the obligation of reparation in
accordance with the preceding articles, in the interest
of the injured State or of the beneficiaries of the obligation
breached.
3.  The requirements for the invocation of responsibility
by an injured State under articles 43, 44 and
45 apply to an invocation of responsibility by a State
entitled to do so under paragraph 1.
Commentary
(1)  Article 48 complements the rule contained in article
42. It deals with the invocation of responsibility by
States other than the injured State acting in the collective
interest. A State which is entitled to invoke responsibility
under article 48 is acting not in its individual capacity by
reason of having suffered injury, but in its capacity as a
member of a group of States to which the obligation is
owed, or indeed as a member of the international community
as a whole. The distinction is underlined by the
phrase “[a]ny State other than an injured State” in paragraph
1 of article 48.
(2)  Article 48 is based on the idea that in case of breaches
of specific obligations protecting the collective interests
of a group of States or the interests of the international
community as a whole, responsibility may be invoked
by States which are not themselves injured in the sense
of article 42. Indeed, in respect of obligations to the international
community as a whole, ICJ specifically said
as much in its judgment in the Barcelona Traction case.721
Although the Court noted that “all States can be held to
have a legal interest in” the fulfilment of these rights, article
48 refrains from qualifying the position of the States
identified in article 48, for example by referring to them
as “interested States”. The term “legal interest” would not
permit a distinction between articles 42 and 48, as injured
States in the sense of article 42 also have legal interests.
(3)  As to the structure of article 48, paragraph 1 defines
the categories of obligations which give rise to the wider
721 Barcelona Traction (see footnote 25 above), p. 32, para. 33.
right to invoke responsibility. Paragraph 2 stipulates which
forms of responsibility States other than injured States
may claim. Paragraph 3 applies the requirements of invocation
contained in articles 43, 44 and 45 to cases where
responsibility is invoked under article 48, paragraph 1.
(4)  Paragraph 1 refers to “[a]ny State other than an injured
State”. In the nature of things, all or many States will
be entitled to invoke responsibility under article 48, and
the term “[a]ny State” is intended to avoid any implication
that these States have to act together or in unison. Moreover,
their entitlement will coincide with that of any injured
State in relation to the same internationally wrongful
act in those cases where a State suffers individual injury
from a breach of an obligation to which article 48
applies.
(5)  Paragraph 1 defines the categories of obligations,
the breach of which may entitle States other than the injured
State to invoke State responsibility. A distinction is
drawn between obligations owed to a group of States and
established to protect a collective interest of the group
(paragraph 1 (a)), and obligations owed to the international
community as a whole (paragraph 1 (b)).722
(6)  Under paragraph 1 (a), States other than the injured
State may invoke responsibility if two conditions are met:
first, the obligation whose breach has given rise to responsibility
must have been owed to a group to which the State
invoking responsibility belongs; and secondly, the obligation
must have been established for the protection of
a collective interest. The provision does not distinguish
between different sources of international law; obligations
protecting a collective interest of the group may derive
from multilateral treaties or customary international
law. Such obligations have sometimes been referred to as
“obligations erga omnes partes”.
(7)  Obligations coming within the scope of paragraph 1
(a) have to be “collective obligations”, i.e. they must apply
between a group of States and have been established
in some collective interest.723 They might concern, for
example, the environment or security of a region (e.g. a
regional nuclear-free-zone treaty or a regional system for
the protection of human rights). They are not limited to arrangements
established only in the interest of the member
States but would extend to agreements established by a
group of States in some wider common interest.724 But in
any event the arrangement must transcend the sphere of
bilateral relations of the States parties. As to the requirement
that the obligation in question protect a collective
interest, it is not the function of the articles to provide
an enumeration of such interests. If they fall within paragraph
1 (a), their principal purpose will be to foster a
common interest, over and above any interests of the States
concerned individually. This would include situations in
722 For the extent of responsibility for serious breaches of obligations
to the international community as a whole, see Part Two, chap. III and
commentary.
723 See also paragraph (11) of the commentary to article 42.
724 In the S.S. “Wimbledon” (see footnote 34 above), the Court noted
“[t]he intention of the authors of the Treaty of Versailles to facilitate
access to the Baltic by establishing an international regime, and consequently
to keep the canal open at all times to foreign vessels of every
kind” (p. 23).
	 State responsibility	 127
which States, attempting to set general standards of protection
for a group or people, have assumed obligations protecting
non-State entities.725
(8)  Under paragraph 1 (b), States other than the injured
State may invoke responsibility if the obligation in
question was owed “to the international community as
a whole”.726 The provision intends to give effect to the
statement by ICJ in the Barcelona Traction case, where
the Court drew “an essential distinction” between obligations
owed to particular States and those owed “towards
the international community as a whole”.727 With regard
to the latter, the Court went on to state that “[i]n view of
the importance of the rights involved, all States can be
held to have a legal interest in their protection; they are
obligations erga omnes”.
(9)  While taking up the essence of this statement, the
articles avoid use of the term “obligations erga omnes”,
which conveys less information than the Court’s reference
to the international community as a whole and has
sometimes been confused with obligations owed to all the
parties to a treaty. Nor is it the function of the articles to
provide a list of those obligations which under existing
international law are owed to the international community
as a whole. This would go well beyond the task of codifying
the secondary rules of State responsibility, and in any
event, such a list would be only of limited value, as the
scope of the concept will necessarily evolve over time.
The Court itself has given useful guidance: in its 1970
judgment it referred, by way of example, to “the outlawing
of acts of aggression, and of genocide” and to “the
principles and rules concerning the basic rights of the human
person, including protection from slavery and racial
discrimination”.728 In its judgment in the East Timor case,
the Court added the right of self-determination of peoples
to this list.729
(10)  Each State is entitled, as a member of the international
community as a whole, to invoke the responsibility
of another State for breaches of such obligations. Whereas
the category of collective obligations covered by paragraph
1 (a) needs to be further qualified by the insertion
of additional criteria, no such qualifications are necessary
in the case of paragraph 1 (b). All States are by definition
members of the international community as a whole, and
the obligations in question are by definition collective obligations
protecting interests of the international community
as such. Of course, such obligations may at the same
time protect the individual interests of States, as the prohibition
of acts of aggression protects the survival of each
State and the security of its people. Similarly, individual
States may be specially affected by the breach of such an
725 Article 22 of the Covenant of the League of Nations, establishing
the Mandate system, was a provision in the general interest in this
sense, as were each of the Mandate agreements concluded in accordance
with it. Cf., however, the much-criticized decision of ICJ in South
West Africa, Second Phase, Judgment, I.C.J. Reports 1966, p. 6, from
which article 48 is a deliberate departure.
726 For the terminology “international community as a whole”,
see paragraph (18) of the commentary to article 25.
727 Barcelona Traction (see footnote 25 above), p. 32, para. 33, and
see paragraphs (2) to (6) of the commentary to chapter III of Part Two.
728 Barcelona Traction (ibid.), p. 32, para. 34.
729 See footnote 54 above.
obligation, for example a coastal State specially affected
by pollution in breach of an obligation aimed at protection
of the marine environment in the collective interest.
(11)  Paragraph 2 specifies the categories of claim which
States may make when invoking responsibility under article
48. The list given in the paragraph is exhaustive, and
invocation of responsibility under article 48 gives rise to
a more limited range of rights as compared to those of
injured States under article 42. In particular, the focus of
action by a State under article 48—such State not being
injured in its own right and therefore not claiming compensation
on its own account—is likely to be on the very
question whether a State is in breach and on cessation if the
breach is a continuing one. For example, in the S.S. “Wimbledon”
case, Japan, which had no economic interest in
the particular voyage, sought only a declaration, whereas
France, whose national had to bear the loss, sought and
was awarded damages.730 In the South West Africa cases,
Ethiopia and Liberia sought only declarations of the legal
position.731 In that case, as the Court itself pointed out in
1971, “the injured entity” was a people, viz. the people of
South West Africa.732
(12)  Under paragraph 2 (a), any State referred to in
article 48 is entitled to request cessation of the wrongful
act and, if the circumstances require, assurances and
guarantees of non-repetition under article 30. In addition,
paragraph 2 (b) allows such a State to claim from
the responsible State reparation in accordance with the
provisions of chapter II of Part Two. In case of breaches
of obligations under article 48, it may well be that there
is no State which is individually injured by the breach,
yet it is highly desirable that some State or States be in a
position to claim reparation, in particular restitution. In
accordance with paragraph 2 (b), such a claim must be
made in the interest of the injured State, if any, or of the
beneficiaries of the obligation breached. This aspect of
article 48, paragraph 2, involves a measure of progressive
development, which is justified since it provides a means
of protecting the community or collective interest at stake.
In this context it may be noted that certain provisions, for
example in various human rights treaties, allow invocation
of responsibility by any State party. In those cases
where they have been resorted to, a clear distinction has
been drawn between the capacity of the applicant State
to raise the matter and the interests of the beneficiaries
of the obligation.733 Thus, a State invoking responsibility
under article 48 and claiming anything more than a
declaratory remedy and cessation may be called on to establish
that it is acting in the interest of the injured party.
Where the injured party is a State, its Government will be
able authoritatively to represent that interest. Other cases
may present greater difficulties, which the present articles
730 S.S. “Wimbledon” (see footnote 34 above), p. 30.
731 South West Africa, Preliminary Objections, Judgment, I.C.J. 
Reports 1962, p. 319; South West Africa, Second Phase, Judgment
(see footnote 725 above).
732 Namibia case (see footnote 176 above), p. 56, para. 127.
733 See, e.g., the observations of the European Court of Human
Rights in Denmark v. Turkey (friendly settlement), judgment of 5 April
2000, Reports of Judgments and Decisions 2000-IV, pp. 7, 10 and 11,
paras. 20 and 23.
128	 Report of the International Law Commission on the work of its fifty-third session
cannot solve.734 Paragraph 2 (b) can do no more than set
out the general principle.
(13)  Paragraph 2 (b) refers to the State claiming
“[p]erformance of the obligation of reparation in accordance
with the preceding articles”. This makes it clear that
article 48 States may not demand reparation in situations
where an injured State could not do so. For example, a
demand for cessation presupposes the continuation of the
wrongful act; a demand for restitution is excluded if restitution
itself has become impossible.
(14)  Paragraph 3 subjects the invocation of State
responsibility by States other than the injured State to
the conditions that govern invocation by an injured State,
specifically article 43 (notice of claim), 44 (admissibility
of claims) and 45 (loss of the right to invoke responsibility).
These articles are to be read as applicable equally,
mutatis mutandis, to a State invoking responsibility under
article 48.
Chapter II
COUNTERMEASURES
Commentary
(1)  This chapter deals with the conditions for and limitations
on the taking of countermeasures by an injured
State. In other words, it deals with measures that would
otherwise be contrary to the international obligations of
an injured State vis-à-vis the responsible State, if they
were not taken by the former in response to an internationally
wrongful act by the latter in order to procure cessation
and reparation. Countermeasures are a feature of a
decentralized system by which injured States may seek to
vindicate their rights and to restore the legal relationship
with the responsible State which has been ruptured by the
internationally wrongful act.
(2)  It is recognized both by Governments and by the
decisions of international tribunals that countermeasures
are justified under certain circumstances.735 This is
reflected in article 22 which deals with countermeasures
in response to an internationally wrongful act in the
context of the circumstances precluding wrongfulness.
Like other forms of self-help, countermeasures are liable
to abuse and this potential is exacerbated by the factual
inequalities between States. Chapter II has as its aim to
establish an operational system, taking into account the
exceptional character of countermeasures as a response
734 See also paragraphs (3) to (4) of the commentary to article 33.
735 For the substantial literature, see the bibliographies in E. Zoller,
Peacetime Unilateral Remedies: An Analysis of Countermeasures
(Dobbs Ferry, N.Y., Transnational, 1984), pp. 179–189; O. Y. Elagab,
The Legality of Non-Forcible Counter-Measures in International
Law (Oxford, Clarendon Press, 1988), pp. 227–241; L.-A. Sicilianos,
Les réactions décentralisées à l’illicite: Des contre-mesures à la légitime
défense (Paris, Librairie générale de droit et de jurisprudence,
1990), pp. 501–525; and D. Alland, Justice privée et ordre juridique 
international: Etude théorique des contre-mesures en droit international
public (Paris, Pedone, 1994).
to internationally wrongful conduct. At the same time, it
seeks to ensure, by appropriate conditions and limitations,
that countermeasures are kept within generally acceptable
bounds.
(3)  As to terminology, traditionally the term “reprisals”
was used to cover otherwise unlawful action, including
forcible action, taken by way of self-help in response to
a breach.736 More recently, the term “reprisals” has been
limited to action taken in time of international armed
conflict; i.e. it has been taken as equivalent to belligerent
reprisals. The term “countermeasures” covers that part
of the subject of reprisals not associated with armed conflict,
and in accordance with modern practice and judicial
decisions the term is used in that sense in this chapter.737
Countermeasures are to be contrasted with retorsion, i.e.
“unfriendly” conduct which is not inconsistent with any
international obligation of the State engaging in it even
though it may be a response to an internationally wrongful
act. Acts of retorsion may include the prohibition of
or limitations upon normal diplomatic relations or other
contacts, embargoes of various kinds or withdrawal of
voluntary aid programmes. Whatever their motivation, so
long as such acts are not incompatible with the international
obligations of the States taking them towards the
target State, they do not involve countermeasures and
they fall outside the scope of the present articles. The
term “sanction” is also often used as equivalent to action
taken against a State by a group of States or mandated by
an international organization. But the term is imprecise:
Chapter VII of the Charter of the United Nations refers
only to “measures”, even though these can encompass a
very wide range of acts, including the use of armed force
(Articles 39, 41 and 42). Questions concerning the use
of force in international relations and of the legality of
belligerent reprisals are governed by the relevant primary
rules. On the other hand, the articles are concerned with
countermeasures as referred to in article 22. They are taken
by an injured State in order to induce the responsible
State to comply with its obligations under Part Two. They
are instrumental in character and are appropriately dealt
with in Part Three as an aspect of the implementation of
State responsibility.
(4)  Countermeasures are to be clearly distinguished
from the termination or suspension of treaty relations on
account of the material breach of a treaty by another State,
as provided for in article 60 of the 1969 Vienna Convention.
Where a treaty is terminated or suspended in accordance
with article 60, the substantive legal obligations of
the States parties will be affected, but this is quite different
from the question of responsibility that may already
have arisen from the breach.738 Countermeasures involve
conduct taken in derogation from a subsisting treaty
736 See, e.g., E. de Vattel, The Law of Nations, or the Principles of
Natural Law (footnote 394 above), vol. II, chap. XVIII, p. 342.
737 Air Service Agreement (see footnote 28 above), p. 443,
para. 80; United States Diplomatic and Consular Staff in Tehran
(see footnote 59 above), p. 27, para. 53; Military and Paramilitary 
Activities in and against Nicaragua (see footnote 36 above), at p. 106,
para. 201; and Gabˇcíkovo-Nagymaros Project (see footnote 27 above),
p. 55, para. 82.
738 On the respective scope of the codified law of treaties and the
law of State responsibility, see paragraphs (3) to (7) of the introductory
commentary to chapter V of Part One.
	 State responsibility	 129
obligation but justified as a necessary and proportionate
response to an internationally wrongful act of the State
against which they are taken. They are essentially temporary
measures, taken to achieve a specified end, whose
justification terminates once the end is achieved.
(5)  This chapter does not draw any distinction between
what are sometimes called “reciprocal countermeasures”
and other measures. That term refers to countermeasures
which involve suspension of performance of obligations
towards the responsible State “if such obligations correspond
to, or are directly connected with, the obligation
breached”.739 There is no requirement that States taking
countermeasures should be limited to suspension of performance
of the same or a closely related obligation.740 A
number of considerations support this conclusion. First,
for some obligations, for example those concerning the
protection of human rights, reciprocal countermeasures
are inconceivable. The obligations in question have a nonreciprocal
character and are not only due to other States
but to the individuals themselves.741 Secondly, a limitation
to reciprocal countermeasures assumes that the injured
State will be in a position to impose the same or related
measures as the responsible State, which may not be so.
The obligation may be a unilateral one or the injured State
may already have performed its side of the bargain. Above
all, considerations of good order and humanity preclude
many measures of a reciprocal nature. This conclusion
does not, however, end the matter. Countermeasures are
more likely to satisfy the requirements of necessity and
proportionality if they are taken in relation to the same or
a closely related obligation, as in the Air Service Agreement
arbitration.742
(6)  This conclusion reinforces the need to ensure that
countermeasures are strictly limited to the requirements
of the situation and that there are adequate safeguards
against abuse. Chapter II seeks to do this in a variety of
ways. First, as already noted, it concerns only non-forcible
countermeasures (art. 50, para. 1 (a)). Secondly, countermeasures
are limited by the requirement that they be
directed at the responsible State and not at third parties
(art. 49, paras. 1 and 2). Thirdly, since countermeasures
are intended as instrumental—in other words, since they
are taken with a view to procuring cessation of and reparation
for the internationally wrongful act and not by way
of punishment—they are temporary in character and must
be as far as possible reversible in their effects in terms
of future legal relations between the two States (arts. 49,
paras. 2 and 3, and 53). Fourthly, countermeasures must
be proportionate (art. 51). Fifthly, they must not involve
any departure from certain basic obligations (art. 50,
para. 1), in particular those under peremptory norms of
general international law.
739 See the sixth report of the Special Rapporteur on State responsibility,
William Riphagen, article 8 of Part Two of the draft articles,
Yearbook … 1985, vol. II (Part One), p. 10, document A/CN.4/389.
740 Contrast the exception of non-performance in the law of treaties,
which is so limited: see paragraph (9) of the introductory commentary
to chapter V of Part One.
741 Cf. Ireland v. the United Kingdom (footnote 236 above).
742 See footnote 28 above.
(7)  This chapter also deals to some extent with the conditions
of the implementation of countermeasures. In particular,
countermeasures cannot affect any dispute settlement
procedure which is in force between the two States
and applicable to the dispute (art. 50, para. 2 (a)). Nor
can they be taken in such a way as to impair diplomatic or
consular inviolability (art. 50, para. 2 (b)). Countermeasures
must be preceded by a demand by the injured State
that the responsible State comply with its obligations under
Part Two, must be accompanied by an offer to negotiate,
and must be suspended if the internationally wrongful
act has ceased and the dispute is submitted in good faith
to a court or tribunal with the authority to make decisions
binding on the parties (art. 52, para. 3).
(8)  The focus of the chapter is on countermeasures taken
by injured States as defined in article 42. Occasions
have arisen in practice of countermeasures being taken by
other States, in particular those identified in article 48,
where no State is injured or else on behalf of and at the request
of an injured State. Such cases are controversial and
the practice is embryonic. This chapter does not purport
to regulate the taking of countermeasures by States other
than the injured State. It is, however, without prejudice to
the right of any State identified in article 48, paragraph 1,
to take lawful measures against a responsible State to ensure
cessation of the breach and reparation in the interest
of the injured State or the beneficiaries of the obligation
breached (art. 54).
(9)  In common with other chapters of these articles,
the provisions on countermeasures are residual and may
be excluded or modified by a special rule to the contrary
(see article 55). Thus, a treaty provision precluding the
suspension of performance of an obligation under any circumstances
will exclude countermeasures with respect to
the performance of the obligation. Likewise, a regime for
dispute resolution to which States must resort in the event
of a dispute, especially if (as with the WTO dispute settlement
system) it requires an authorization to take measures
in the nature of countermeasures in response to a proven
breach.743
Article 49.  Object and limits of countermeasures
1.  An injured State may only take countermeasures
against a State which is responsible for an internationally
wrongful act in order to induce that State to
comply with its obligations under Part Two.
2.  Countermeasures are limited to the non-performance
for the time being of international obligations
of the State taking the measures towards the
responsible State.
3.  Countermeasures shall, as far as possible, be
taken in such a way as to permit the resumption of
performance of the obligations in question.
743 See Marrakesh Agreement establishing the World Trade Organization,
annex 2 (Understanding on Rules and Procedures governing the
Settlement of Disputes), arts. 1, 3, para. 7, and 22.
130	 Report of the International Law Commission on the work of its fifty-third session
Commentary
(1)  Article 49 describes the permissible object of countermeasures
taken by an injured State against the responsible
State and places certain limits on their scope.
Countermeasures may only be taken by an injured State
in order to induce the responsible State to comply with its
obligations under Part Two, namely, to cease the internationally
wrongful conduct, if it is continuing, and to provide
reparation to the injured State.744 Countermeasures
are not intended as a form of punishment for wrongful
conduct, but as an instrument for achieving compliance
with the obligations of the responsible State under Part
Two. The limited object and exceptional nature of countermeasures
are indicated by the use of the word “only” in
paragraph 1 of article 49.
(2)  A fundamental prerequisite for any lawful countermeasure
is the existence of an internationally wrongful act
which injured the State taking the countermeasure. This
point was clearly made by ICJ in the Gabˇcíkovo Nagymaros
Project case, in the following passage:
In order to be justifiable, a countermeasure must meet certain conditions
…
In the first place it must be taken in response to a previous international
wrongful act of another State and must be directed against that
State.745
(3)  Paragraph 1 of article 49 presupposes an objective
standard for the taking of countermeasures, and in particular
requires that the countermeasure be taken against a
State which is responsible for an internationally wrongful
act in order to induce that State to comply with its obligations
of cessation and reparation. A State taking countermeasures
acts at its peril, if its view of the question of
wrongfulness turns out not to be well founded. A State
which resorts to countermeasures based on its unilateral
assessment of the situation does so at its own risk and
may incur responsibility for its own wrongful conduct in
the event of an incorrect assessment.746 In this respect,
there is no difference between countermeasures and other
circumstances precluding wrongfulness.747
744 For these obligations, see articles 30 and 31 and commentaries.
745 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 55,
para. 83. See also “Naulilaa” (footnote 337 above), p. 1027; “Cysne”
(footnote 338 above), p. 1057. At the 1930 Hague Conference, all
States which responded on this point took the view that a prior wrongful
act was an indispensable prerequisite for the adoption of reprisals;
see League of Nations, Conference for the Codification of International
Law, Bases of Discussion … (footnote 88 above), p. 128.
746 The tribunal’s remark in the Air Service Agreement case (see footnote
28 above), to the effect that “each State establishes for itself its
legal situation vis-à-vis other States” (p. 443, para. 81) should not be
interpreted in the sense that the United States would have been justified
in taking countermeasures whether or not France was in breach of the
Agreement. In that case the tribunal went on to hold that the United
States was actually responding to a breach of the Agreement by France,
and that its response met the requirements for countermeasures under
international law, in particular in terms of purpose and proportionality.
The tribunal did not decide that an unjustified belief by the United
States as to the existence of a breach would have been sufficient.
747 See paragraph (8) of the introductory commentary to chapter V
of Part One.
(4)  A second essential element of countermeasures is
that they “must be directed against”748 a State which has
committed an internationally wrongful act, and which has
not complied with its obligations of cessation and reparation
under Part Two of the present articles.749 The word
“only” in paragraph 1 applies equally to the target of the
countermeasures as to their purpose and is intended to
convey that countermeasures may only be adopted against
a State which is the author of the internationally wrongful
act. Countermeasures may not be directed against States
other than the responsible State. In a situation where a
third State is owed an international obligation by the State
taking countermeasures and that obligation is breached by
the countermeasure, the wrongfulness of the measure is
not precluded as against the third State. In that sense the
effect of countermeasures in precluding wrongfulness is
relative. It concerns the legal relations between the injured
State and the responsible State.750
(5)  This does not mean that countermeasures may not
incidentally affect the position of third States or indeed
other third parties. For example, if the injured State suspends
transit rights with the responsible State in accordance
with this chapter, other parties, including third States,
may be affected thereby. If they have no individual rights
in the matter they cannot complain. The same is true if, as
a consequence of suspension of a trade agreement, trade
with the responsible State is affected and one or more
companies lose business or even go bankrupt. Such indirect
or collateral effects cannot be entirely avoided.
(6)  In taking countermeasures, the injured State effectively
withholds performance for the time being of one or
more international obligations owed by it to the responsible
State, and paragraph 2 of article 49 reflects this element.
Although countermeasures will normally take the
form of the non-performance of a single obligation, it is
possible that a particular measure may affect the performance
of several obligations simultaneously. For this reason,
paragraph 2 refers to “obligations” in the plural. For
example, freezing of the assets of a State might involve
what would otherwise be the breach of several obligations
to that State under different agreements or arrangements.
Different and coexisting obligations might be affected by
the same act. The test is always that of proportionality, and
a State which has committed an internationally wrongful
act does not thereby make itself the target for any form
or combination of countermeasures, irrespective of their
severity or consequences.751
(7)  The phrase “for the time being” in paragraph 2 indicates
the temporary or provisional character of countermeasures.
Their aim is the restoration of a condition of
legality as between the injured State and the responsible
748 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), pp. 55–
56, para. 83.
749 In the Gabˇcíkovo-Nagymaros Project case ICJ held that the
requirement had been satisfied, in that Hungary was in continuing
breach of its obligations under a bilateral treaty, and Czechoslovakia’s
response was directed against it on that ground.
750 On the specific question of human rights obligations, see
article 50, paragraph (1) (b), and commentary.
751 See article 51 and commentary. In addition, the performance of
certain obligations may not be withheld by way of countermeasures in
any circumstances: see article 50 and commentary.
	 State responsibility	 131
State, and not the creation of new situations which cannot
be rectified whatever the response of the latter State to the
claims against it.752 Countermeasures are taken as a form
of inducement, not punishment: if they are effective in inducing
the responsible State to comply with its obligations
of cessation and reparation, they should be discontinued
and performance of the obligation resumed.
(8)  Paragraph 1 of article 49 refers to the obligations of
the responsible State “under Part Two”. It is to ensuring
the performance of these obligations that countermeasures
are directed. In many cases the main focus of countermeasures
will be to ensure cessation of a continuing
wrongful act, but they may also be taken to ensure reparation,
provided the other conditions laid down in chapter II
are satisfied. Any other conclusion would immunize from
countermeasures a State responsible for an internationally
wrongful act if the act had ceased, irrespective of the seriousness
of the breach or its consequences, or of the State’s
refusal to make reparation for it. In this context an issue
arises whether countermeasures should be available where
there is a failure to provide satisfaction as demanded by
the injured State, given the subsidiary role this remedy
plays in the spectrum of reparation.753 In normal situations,
satisfaction will be symbolic or supplementary and
it would be highly unlikely that a State which had ceased
the wrongful act and tendered compensation to the injured
State could properly be made the target of countermeasures
for failing to provide satisfaction as well. This concern
may be adequately addressed by the application of
the notion of proportionality set out in article 51.754
(9)  Paragraph 3 of article 49 is inspired by article 72,
paragraph 2, of the 1969 Vienna Convention, which provides
that when a State suspends a treaty it must not, during
the suspension, do anything to preclude the treaty
from being brought back into force. By analogy, States
should as far as possible choose countermeasures that are
reversible. In the Gabˇcíkovo-Nagymaros Project case, the
existence of this condition was recognized by the Court,
although it found that it was not necessary to pronounce
on the matter. After concluding that “the diversion of the
Danube carried out by Czechoslovakia was not a lawful
countermeasure because it was not proportionate”, the
Court said:
It is therefore not required to pass upon one other condition for the lawfulness
of a countermeasure, namely that its purpose must be to induce
the wrongdoing State to comply with its obligations under international
law, and that the measure must therefore be reversible.755
However, the duty to choose measures that are reversible
is not absolute. It may not be possible in all cases to reverse
all of the effects of countermeasures after the occasion
for taking them has ceased. For example, a requirement
of notification of some activity is of no value after
the activity has been undertaken. By contrast, inflicting
irreparable damage on the responsible State could amount
752 This notion is further emphasized by articles 49, paragraph 3,
and 53 (termination of countermeasures).
753 See paragraph (1) of the commentary to article 37.
754 Similar considerations apply to assurances and guarantees of nonrepetition.
See article 30, subparagraph (b), and commentary.
755 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), pp. 56–
57, para. 87.
to punishment or a sanction for non-compliance, not a
countermeasure as conceived in the articles. The phrase
“as far as possible” in paragraph 3 indicates that if the
injured State has a choice between a number of lawful
and effective countermeasures, it should select one which
permits the resumption of performance of the obligations
suspended as a result of countermeasures.
Article 50.  Obligations not affected
by countermeasures
1.  Countermeasures shall not affect:
(a)  the obligation to refrain from the threat or use
of force as embodied in the Charter of the United
Nations;
(b)  obligations for the protection of fundamental
human rights;
(c)  obligations of a humanitarian character prohibiting
reprisals;
(d)  other obligations under peremptory norms of
general international law.
2.  A State taking countermeasures is not relieved
from fulfilling its obligations:
(a)  under any dispute settlement procedure applicable
between it and the responsible State;
(b)  to respect the inviolability of diplomatic or consular
agents, premises, archives and documents.
Commentary
(1)  Article 50 specifies certain obligations the performance
of which may not be impaired by countermeasures.
An injured State is required to continue to respect these
obligations in its relations with the responsible State, and
may not rely on a breach by the responsible State of its
obligations under Part Two to preclude the wrongfulness
of any non-compliance with these obligations. So far as
the law of countermeasures is concerned, they are sacro-
sanct.
(2)  The obligations dealt with in article 50 fall into two
basic categories. Paragraph 1 deals with certain obligations
which, by reason of their character, must not be
the subject of countermeasures at all. Paragraph 2 deals
with certain obligations relating in particular to the maintenance
of channels of communication between the two
States concerned, including machinery for the resolution
of their disputes.
(3)  Paragraph 1 of article 50 identifies four categories
of fundamental substantive obligations which may not be
affected by countermeasures: (a) the obligation to refrain
from the threat or use of force as embodied in the Charter
of the United Nations; (b) obligations for the protection
of fundamental human rights; (c) obligations of a humanitarian
character prohibiting reprisals; and (d) other obligations
under peremptory norms of general international
law.
132	 Report of the International Law Commission on the work of its fifty-third session
(4)  Paragraph 1 (a) deals with the prohibition of the
threat or use of force as embodied in the Charter of the
United Nations, including the express prohibition of the
use of force in Article 2, paragraph 4. It excludes forcible
measures from the ambit of permissible countermeasures
under chapter II.
(5)  The prohibition of forcible countermeasures is
spelled out in the Declaration on Principles of International
Law concerning Friendly Relations and Cooperation
among States in accordance with the Charter of the
United Nations, by which the General Assembly proclaimed
that “States have a duty to refrain from acts of
reprisal involving the use of force”.756 The prohibition is
also consistent with the prevailing doctrine as well as a
number of authoritative pronouncements of international
judicial757 and other bodies.758
(6)  Paragraph 1 (b) provides that countermeasures may
not affect obligations for the protection of fundamental
human rights. In the “Naulilaa” arbitration, the tribunal
stated that a lawful countermeasure must be “limited by
the requirements of humanity and the rules of good faith
applicable in relations between States”.759 The Institut de
droit international in its 1934 resolution stated that in taking
countermeasures a State must “abstain from any harsh
measure which would be contrary to the laws of humanity
or the demands of the public conscience”.760 This has
been taken further as a result of the development since
1945 of international human rights. In particular, the relevant
human rights treaties identify certain human rights
which may not be derogated from even in time of war or
other public emergency.761
(7)  In its general comment No. 8 (1997) the Committee
on Economic, Social and Cultural Rights discussed
the effect of economic sanctions on civilian populations
and especially on children. It dealt both with the effect
of measures taken by international organizations, a topic
which falls outside the scope of the present articles,762
as well as with countermeasures imposed by individual
States or groups of States. It stressed that “whatever the
circumstances, such sanctions should always take full account
of the provisions of the International Covenant on
756 General Assembly resolution 2625 (XXV), annex, first principle.
The Final Act of the Conference on Security and Co-operation in
Europe also contains an explicit condemnation of forcible measures.
Part of Principle II of the Declaration on Principles Guiding Relations
between Participating States embodied in the first “Basket” of that
Final Act reads: “Likewise [the participating States] will also refrain
in their mutual relations from any act of reprisal by force.”
757 See especially Corfu Channel, Merits (footnote 35 above),
p. 35; and Military and Paramilitary Activities in and against Nicaragua
(footnote 36 above), p. 127, para. 249.
758 See, e.g., Security Council resolutions 111 (1956) of 19 January
1956, 171 (1962) of 9 April 1962, 188 (1964) of 9 April 1964, 316
(1972) of 26 June 1972, 332 (1973) of 21 April 1973, 573 (1985) of
4 October 1985 and 1322 (2000) of 7 October 2000. See also General
Assembly resolution 41/38 of 20 November 1986.
759 “Naulilaa” (see footnote 337 above), p. 1026.
760 Annuaire de l’Institut de droit international, vol. 38 (1934),
p. 710.
761 See article 4 of the International Covenant on Civil and Political
Rights; article 15 of the European Convention on Human Rights; and
article 27 of the American Convention on Human Rights.
762 See below, article 59 and commentary.
Economic, Social and Cultural Rights”,763 and went on to
state that:
it is essential to distinguish between the basic objective of applying
political and economic pressure upon the governing elite of a country to
persuade them to conform to international law, and the collateral infliction
of suffering upon the most vulnerable groups within the targeted
country.764
Analogies can be drawn from other elements of general
international law. For example, paragraph 1 of article 54
of the Protocol Additional to the Geneva Conventions of
12 August 1949, and relating to the protection of victims
of international armed conflicts (Protocol I) stipulates unconditionally
that “[s]tarvation of civilians as a method of
warfare is prohibited”.765 Likewise, the final sentence of
paragraph 2 of article 1 of the International Covenant on
Economic, Social and Cultural Rights and of the International
Covenant on Civil and Political Rights states that
“In no case may a people be deprived of its own means of
subsistence”.
(8)  Paragraph 1 (c) deals with the obligations of humanitarian
law with regard to reprisals and is modelled on
article 60, paragraph 5, of the 1969Vienna Convention.766
The paragraph reflects the basic prohibition of reprisals
against individuals, which exists in international humanitarian
law. In particular, under the Geneva Convention
relative to the Treatment of Prisoners of War of 1929, the
Geneva Conventions of 12 August 1949 and the Protocol
Additional to the Geneva Conventions of 12 August 1949,
and relating to the protection of victims of international
armed conflicts (Protocol I) of 1977, reprisals are prohibited
against defined classes of protected persons, and
these prohibitions are very widely accepted.767
(9)  Paragraph 1 (d) prohibits countermeasures affecting
obligations under peremptory norms of general international
law. Evidently, a peremptory norm, not subject to
derogation as between two States even by treaty, cannot be
derogated from by unilateral action in the form of countermeasures.
Subparagraph (d) reiterates for the purposes
of the present chapter the recognition in article 26 that
the circumstances precluding wrongfulness elaborated in
chapter V of Part One do not affect the wrongfulness of
any act of a State which is not in conformity with an obligation
arising under a peremptory norm of general international
law. The reference to “other” obligations under
763 E/C.12/1997/8, para. 1.
764 Ibid., para. 4.
765 See also paragraph 2 of article 54 (“objects indispensable to the
survival of the civilian population”) and article 75. See also Protocol
Additional to the Geneva Conventions of 12 August 1949, and relating
to the protection of victims of non-international armed conflicts
(Protocol II).
766 Paragraph 5 of article 60 of the 1969 Vienna Convention precludes
a State from suspending or terminating for material breach
any treaty provision “relating to the protection of the human person
contained in treaties of a humanitarian character, in particular to provisions
prohibiting any form of reprisals against persons protected by
such treaties”. This paragraph was added at the Vienna Conference on
the Law of Treaties on a vote of 88 votes in favour, none against and
7 abstentions.
767 See K. J. Partsch, “Reprisals”, Encyclopedia of Public International
Law, R. Bernhardt, ed. (Amsterdam, Elsevier, 2000), vol. 4,
p. 200, at pp. 203–204; and S. Oeter, “Methods and means of combat”,
D. Fleck, ed., op. cit. (footnote 409 above) p. 105, at pp. 204–207, paras.
476–479, with references to relevant provisions.
	 State responsibility	 133
peremptory norms makes it clear that subparagraph (d)
does not qualify the preceding subparagraphs, some of
which also encompass norms of a peremptory character.
In particular, subparagraphs (b) and (c) stand on their own.
Subparagraph (d) allows for the recognition of further
peremptory norms creating obligations which may not be
the subject of countermeasures by an injured State.768
(10)  States may agree between themselves on other
rules of international law which may not be the subject
of countermeasures, whether or not they are regarded as
peremptory norms under general international law. This
possibility is covered by the lex specialis provision in article
55 rather than by the exclusion of countermeasures
under article 50, paragraph 1 (d). In particular, a bilateral
or multilateral treaty might renounce the possibility of
countermeasures being taken for its breach, or in relation
to its subject matter. This is the case, for example, with the
European Union treaties, which have their own system of
enforcement.769 Under the dispute settlement system of
WTO, the prior authorization of the Dispute Settlement
Body is required before a member can suspend concessions
or other obligations under the WTO agreements in
response to a failure of another member to comply with
recommendations and rulings of a WTO panel or the
Appellate Body.770 Pursuant to article 23 of the WTO Dispute
Settlement Understanding (DSU), members seeking
“the redress of a violation of obligations or other nullification
or impairment of benefits” under the WTO agreements,
“shall have recourse to, and abide by” the DSU
rules and procedures. This has been construed both as
an “exclusive dispute resolution clause” and as a clause
“preventing WTO members from unilaterally resolving
their disputes in respect ofWTO rights and obligations”.771
To the extent that derogation clauses or other treaty provisions
(e.g. those prohibiting reservations) are properly
interpreted as indicating that the treaty provisions are
“intransgressible”,772 they may entail the exclusion of
countermeasures.
(11)  In addition to the substantive limitations on the taking
of countermeasures in paragraph 1 of article 50, paragraph
2 provides that countermeasures may not be taken
with respect to two categories of obligations, viz. certain
obligations under dispute settlement procedures applicable
between it and the responsible State, and obligations with
768 See paragraphs (4) to (6) of the commentary to article 40.
769 On the exclusion of unilateral countermeasures in European
Union law, see, for example, joined cases 90 and 91‑63 (Commission
of the European Economic Community v. Grand Duchy of Luxembourg
and Kingdom of Belgium), Reports of cases before the Court, p. 625, at
p. 631 (1964); case 52/75 (Commission of the European Communities 
v. Italian Republic), ibid., p. 277, at p. 284 (1976); case 232/78
(Commission of the European Economic Communities v. French Republic),
ibid., p. 2729 (1979); and case C-5/94 (The Queen. v. Ministry 
of Agriculture, Fisheries and Food, ex parte Hedley Lomas (Ireland)
Ltd.), Reports of cases before the Court of Justice and the Court of First 
Instance, p. I–2553 (1996).
770 See Marrakesh Agreement establishing the World Trade Organization,
annex 2 (Understanding on Rules and Procedures governing the
Settlement of Disputes), arts. 3, para. 7 and 22.
771 See WTO, Report of the Panel, United States–Sections 301–310
of the Trade Act of 1974 (footnote 73 above), paras. 7.35–7.46.
772 To use the synonym adopted by ICJ in its advisory opinion on
Legality of the Threat or Use of Nuclear Weapons (see footnote 54
above), p. 257, para. 79.
respect to diplomatic and consular inviolability. The justification
in each case concerns not so much the substantive
character of the obligation but its function in relation to
the resolution of the dispute between the parties which has
given rise to the threat or use of countermeasures.
(12)  The first of these, contained in paragraph 2 (a),
applies to “any dispute settlement procedure applicable”
between the injured State and the responsible State. This
phrase refers only to dispute settlement procedures that are
related to the dispute in question and not to other unrelated
issues between the States concerned. For this purpose the
dispute should be considered as encompassing both the
initial dispute over the internationally wrongful act and
the question of the legitimacy of the countermeasure(s)
taken in response.
(13)  It is a well-established principle that dispute settlement
provisions must be upheld notwithstanding that they
are contained in a treaty which is at the heart of the dispute
and the continued validity or effect of which is challenged.
As ICJ said in Appeal Relating to the Jurisdiction
of the ICAO Council:
Nor in any case could a merely unilateral suspension per se render jurisdictional
clauses inoperative, since one of their purposes might be,
precisely, to enable the validity of the suspension to be tested.773
Similar reasoning underlies the principle that dispute settlement
provisions between the injured and the responsible
State and applicable to their dispute may not be suspended
by way of countermeasures. Otherwise, unilateral action
would replace an agreed provision capable of resolving
the dispute giving rise to the countermeasures. The point
was affirmed by the Court in the United States Diplomatic
and Consular Staff in Tehran case:
In any event, any alleged violation of the Treaty [of Amity] by either
party could not have the effect of precluding that party from invoking
the provisions of theTreaty concerning pacific settlement of disputes.774
(14)  The second exception in paragraph 2 (b) limits the
extent to which an injured State may resort, by way of
countermeasures, to conduct inconsistent with its obligations
in the field of diplomatic or consular relations. An
injured State could envisage action at a number of levels.
To declare a diplomat persona non grata, to terminate
or suspend diplomatic relations, to recall ambassadors in
situations provided for in the Vienna Convention on Diplomatic
Relations—such acts do not amount to countermeasures
in the sense of this chapter. At a second level,
measures may be taken affecting diplomatic or consular
privileges, not prejudicing the inviolability of diplomatic
or consular personnel or of premises, archives and documents.
Such measures may be lawful as countermeasures
if the requirements of this chapter are met. On the other
hand, the scope of prohibited countermeasures under article
50, paragraph 2 (b), is limited to those obligations
which are designed to guarantee the physical safety and
inviolability (including the jurisdictional immunity) of
diplomatic agents, premises, archives and documents in
773 Appeal Relating to the Jurisdiction of the ICAO Council (India
v. Pakistan), Judgment, I.C.J. Reports 1972, p. 46, at p. 53. See also
S. M. Schwebel, International Arbitration: Three Salient Problems
(Cambridge, Grotius, 1987), pp. 13–59.
774 United States Diplomatic and Consular Staff in Tehran
(see footnote 59 above), p. 28, para. 53.
134	 Report of the International Law Commission on the work of its fifty-third session
all circumstances, including armed conflict.775 The same
applies, mutatis mutandis, to consular officials.
(15)  In the United States Diplomatic and Consular Staff
in Tehran case, ICJ stressed that “diplomatic law itself
provides the necessary means of defence against, and
sanction for, illicit activities by members of diplomatic or
consular missions”,776 and it concluded that violations of
diplomatic or consular immunities could not be justified
even as countermeasures in response to an internationally
wrongful act by the sending State. As the Court said:
The rules of diplomatic law, in short, constitute a self-contained regime
which, on the one hand, lays down the receiving State’s obligations
regarding the facilities, privileges and immunities to be accorded to
diplomatic missions and, on the other, foresees their possible abuse by
members of the mission and specifies the means at the disposal of the
receiving State to counter any such abuse.777
If diplomatic or consular personnel could be targeted by
way of countermeasures, they would in effect constitute
resident hostages against perceived wrongs of the sending
State, undermining the institution of diplomatic and
consular relations. The exclusion of any countermeasures
infringing diplomatic and consular inviolability is thus
justified on functional grounds. It does not affect the various
avenues for redress available to the receiving State
under the terms of the Vienna Convention on Diplomatic
Relations and the Vienna Convention on Consular Relations.778
On the other hand, no reference need be made in
article 50, paragraph 2 (b), to multilateral diplomacy. The
representatives of States to international organizations are
covered by the reference to diplomatic agents. As for officials
of international organizations themselves, no retaliatory
step taken by a host State to their detriment could
qualify as a countermeasure since it would involve noncompliance
not with an obligation owed to the responsible
State but with an obligation owed to a third party, i.e. the
international organization concerned.
Article 51.  Proportionality
Countermeasures must be commensurate with the
injury suffered, taking into account the gravity of the
internationally wrongful act and the rights in ques-
tion.
Commentary
(1)  Article 51 establishes an essential limit on the taking
of countermeasures by an injured State in any given case,
based on considerations of proportionality. It is relevant
in determining what countermeasures may be applied and
775 See, e.g., Vienna Convention on Diplomatic Relations, arts. 22,
24, 29, 44 and 45.
776 United States Diplomatic and Consular Staff in Tehran (see
footnote 59 above), p. 38, para. 83.
777 Ibid., p. 40, para. 86. Cf. article 45, subparagraph (a), of the
Vienna Convention on Diplomatic Relations; article 27, paragraph 1
(a), of the Vienna Convention on Consular Relations (premises, property
and archives to be protected “even in case of armed conflict”).
778 See articles 9, 11, 26, 36, paragraph 2, 43 (b) and 47, paragraph
2 (a), of the Vienna Convention on Diplomatic Relations; and
articles 10, paragraph 2, 12, 23, 25 (b) and (c) and article 35, paragraph
(3), of the Vienna Convention on Consular Relations.
their degree of intensity. Proportionality provides a measure
of assurance inasmuch as disproportionate countermeasures
could give rise to responsibility on the part of
the State taking such measures.
(2)  Proportionality is a well-established requirement
for taking countermeasures, being widely recognized in
State practice, doctrine and jurisprudence. According to
the award in the “Naulilaa” case:
even if one were to admit that the law of nations does not require that
the reprisal should be approximately in keeping with the offence, one
should certainly consider as excessive and therefore unlawful reprisals
out of all proportion to the act motivating them.779
(3)  In the Air Service Agreement arbitration,780 the issue
of proportionality was examined in some detail. In that
case there was no exact equivalence between France’s refusal
to allow a change of gauge in London on flights from
the west coast of the United States and the United States’
countermeasure which suspended Air France flights to
Los Angeles altogether. The tribunal nonetheless held the
United States measures to be in conformity with the principle
of proportionality because they “do not appear to be
clearly disproportionate when compared to those taken by
France”. In particular, the majority said:
It is generally agreed that all counter-measures must, in the first instance,
have some degree of equivalence with the alleged breach: this
is a well-known rule … It has been observed, generally, that judging
the “proportionality” of counter-measures is not an easy task and can
at best be accomplished by approximation. In the Tribunal’s view, it is
essential, in a dispute between States, to take into account not only the
injuries suffered by the companies concerned but also the importance of
the questions of principle arising from the alleged breach. The Tribunal
thinks that it will not suffice, in the present case, to compare the losses
suffered by Pan Am on account of the suspension of the projected services
with the losses which the French companies would have suffered
as a result of the counter-measures; it will also be necessary to take
into account the importance of the positions of principle which were
taken when the French authorities prohibited changes of gauge in third
countries. If the importance of the issue is viewed within the framework
of the general air transport policy adopted by the United States
Government and implemented by the conclusion of a large number of
international agreements with countries other than France, the measures
taken by the United States do not appear to be clearly disproportionate
when compared to those taken by France. Neither Party has provided
the Tribunal with evidence that would be sufficient to affirm or reject
the existence of proportionality in these terms, and the Tribunal must be
satisfied with a very approximative appreciation. 781
In that case the countermeasures taken were in the same
field as the initial measures and concerned the same
routes, even if they were rather more severe in terms of
their economic effect on the French carriers than the initial
French action.
(4)  The question of proportionality was again central
to the appreciation of the legality of possible countermeasures
taken by Czechoslovakia in the GabˇcíkovoNagymaros
Project case.782 ICJ, having accepted that
779 “Naulilaa” (see footnote 337 above), p. 1028.
780 Air Service Agreement (see footnote 28 above), para. 83.
781 Ibid.; Reuter, dissenting, accepted the tribunal’s legal analysis of
proportionality but suggested that there were “serious doubts on the
proportionality of the counter-measures taken by the United States,
which the tribunal has been unable to assess definitely” (p. 448).
782 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 56,
paras. 85 and 87, citing Territorial Jurisdiction of the International
Commission of the River Oder, Judgment No. 16, 1929, P.C.I.J., Series
A, No. 23, p. 27.
	 State responsibility	 135
Hungary’s actions in refusing to complete the Project
amounted to an unjustified breach of the Treaty on the
Construction and Operation of the Gabˇcíkovo-Nagymaros
Barrage System of 1977, went on to say:
In the view of the Court, an important consideration is that the effects
of a countermeasure must be commensurate with the injury suffered,
taking account of the rights in question.
In 1929, the Permanent Court of International Justice, with regard to
navigation on the River Oder, stated as follows:
“[the] community of interest in a navigable river becomes the basis
of a common legal right, the essential features of which are the
perfect equality of all riparian States in the user [sic] of the whole
course of the river and the exclusion of any preferential privilege of
any one riparian State in relation to the others”...
Modern development of international law has strengthened this
principle for non-navigational uses of international watercourses as
well ...
The Court considers that Czechoslovakia, by unilaterally assuming
control of a shared resource, and thereby depriving Hungary of its
right to an equitable and reasonable share of the natural resources of the
Danube—with the continuing effects of the diversion of these waters on
the ecology of the riparian area of the Szigetköz—failed to respect the
proportionality which is required by international law ...
The Court thus considers that the diversion of the Danube carried
out by Czechoslovakia was not a lawful countermeasure because it was
not proportionate.
Thus, the Court took into account the quality or character
of the rights in question as a matter of principle and (like
the tribunal in the Air Service Agreement case) did not
assess the question of proportionality only in quantitative
terms.
(5)  In other areas of the law where proportionality is
relevant (e.g. self-defence), it is normal to express the requirement
in positive terms, even though, in those areas
as well, what is proportionate is not a matter which can
be determined precisely.783 The positive formulation of
the proportionality requirement is adopted in article 51.
A negative formulation might allow too much latitude, in
a context where there is concern as to the possible abuse
of countermeasures.
(6)  Considering the need to ensure that the adoption of
countermeasures does not lead to inequitable results, proportionality
must be assessed taking into account not only
the purely “quantitative” element of the injury suffered,
but also “qualitative” factors such as the importance of the
interest protected by the rule infringed and the seriousness
of the breach. Article 51 relates proportionality primarily
to the injury suffered but “taking into account” two further
criteria: the gravity of the internationally wrongful
act, and the rights in question. The reference to “the rights
in question” has a broad meaning, and includes not only
the effect of a wrongful act on the injured State but also
on the rights of the responsible State. Furthermore, the
position of other States which may be affected may also
be taken into consideration.
(7)  Proportionality is concerned with the relationship
between the internationally wrongful act and the countermeasure.
In some respects proportionality is linked to the
783 E. Cannizzaro, Il principio della proporzionalità nell’ordina- 
mento internazionale (Milan, Giuffrè, 2000).
requirement of purpose specified in article 49: a clearly
disproportionate measure may well be judged not to have
been necessary to induce the responsible State to comply
with its obligations but to have had a punitive aim and to
fall outside the purpose of countermeasures enunciated in
article 49. Proportionality is, however, a limitation even
on measures which may be justified under article 49. In
every case a countermeasure must be commensurate with
the injury suffered, including the importance of the issue
of principle involved and this has a function partly independent
of the question whether the countermeasure was
necessary to achieve the result of ensuring compliance.
Article 52.  Conditions relating to resort
to countermeasures
1.  Before taking countermeasures, an injured
State shall:
(a)  call upon the responsible State, in accordance
with article 43, to fulfil its obligations under Part
Two;
(b)  notify the responsible State of any decision to
take countermeasures and offer to negotiate with that
State.
2.  Notwithstanding paragraph 1 (b), the injured
State may take such urgent countermeasures as are
necessary to preserve its rights.
3.  Countermeasures may not be taken, and if already
taken must be suspended without undue delay
if:
(a)  the internationally wrongful act has ceased;
and
(b)  the dispute is pending before a court or tribunal
which has the authority to make decisions binding on
the parties.
4.  Paragraph 3 does not apply if the responsible
State fails to implement the dispute settlement procedures
in good faith.
Commentary
(1)  Article 52 lays down certain procedural conditions
relating to the resort to countermeasures by the injured
State. Before taking countermeasures an injured State is
required to call on the responsible State in accordance
with article 43 to comply with its obligations under Part
Two. The injured State is also required to notify the responsible
State that it intends to take countermeasures and
to offer to negotiate with that State. Notwithstanding this
second requirement, the injured State may take certain urgent
countermeasures to preserve its rights. If the responsible
State has ceased the internationally wrongful act and
the dispute is before a competent court or tribunal, countermeasures
may not be taken; if already taken, they must
be suspended. However, this requirement does not apply if
the responsible State fails to implement dispute settlement
procedures in good faith. In such a case countermeasures
do not have to be suspended and may be resumed.
136	 Report of the International Law Commission on the work of its fifty-third session
(2)  Overall, article 52 seeks to establish reasonable procedural
conditions for the taking of countermeasures in a
context where compulsory third party settlement of disputes
may not be available, immediately or at all.784 At the
same time, it needs to take into account the possibility that
there may be an international court or tribunal with authority
to make decisions binding on the parties in relation
to the dispute. Countermeasures are a form of self-help,
which responds to the position of the injured State in an
international system in which the impartial settlement of
disputes through due process of law is not yet guaranteed.
Where a third party procedure exists and has been invoked
by either party to the dispute, the requirements of that procedure,
e.g. as to interim measures of protection, should
substitute as far as possible for countermeasures. On the
other hand, even where an international court or tribunal
has jurisdiction over a dispute and authority to indicate
interim measures of protection, it may be that the responsible
State is not cooperating in that process. In such cases
the remedy of countermeasures necessarily revives.
(3)  The system of article 52 builds upon the observations
of the tribunal in the Air Service Agreement arbitration.785
The first requirement, set out in paragraph 1
(a), is that the injured State must call on the responsible
State to fulfil its obligations of cessation and reparation
before any resort to countermeasures. This requirement
(sometimes referred to as “sommation”) was stressed both
by the tribunal in the Air Service Agreement arbitration786
and by ICJ in the Gabˇcíkovo-Nagymaros Project case.787
It also appears to reflect a general practice.788
(4)  The principle underlying the notification requirement
is that, considering the exceptional nature and potentially
serious consequences of countermeasures, they
should not be taken before the other State is given notice
of a claim and some opportunity to present a response. In
practice, however, there are usually quite extensive and
detailed negotiations over a dispute before the point is
reached where some countermeasures are contemplated.
In such cases the injured State will already have notified
the responsible State of its claim in accordance with article
43, and it will not have to do it again in order to comply
with paragraph 1 (a).
(5)  Paragraph 1 (b) requires that the injured State which
decides to take countermeasures should notify the responsible
State of that decision to take countermeasures
and offer to negotiate with that State. Countermeasures
can have serious consequences for the target State, which
should have the opportunity to reconsider its position
faced with the proposed countermeasures. The temporal
relationship between the operation of subparagraphs (a)
784 See above, paragraph (7) of the commentary to the present
chapter.
785 Air Service Agreement (see footnote 28 above), pp. 445–446,
paras. 91 and 94–96.
786 Ibid., p. 444, paras. 85–87.
787 Gabˇcíkovo-Nagymaros Project (see footnote 27 above), p. 56,
para. 84.
788 A. Gianelli, Adempimenti preventivi all’adozione di contromisure
internazionali (Milan, Giuffrè, 1997).
and (b) of paragraph 1 is not strict. Notifications could be
made close to each other or even at the same time.
(6)  Under paragraph 2, however, the injured State may
take “such urgent countermeasures as are necessary to
preserve its rights” even before any notification of the
intention to do so. Under modern conditions of communications,
a State which is responsible for an internationally
wrongful act and which refuses to cease that act or
provide any redress therefore may also seek to immunize
itself from countermeasures, for example by withdrawing
assets from banks in the injured State. Such steps can be
taken within a very short time, so that the notification required
by paragraph 1 (b) might frustrate its own purpose.
Hence, paragraph 2 allows for urgent countermeasures
which are necessary to preserve the rights of the injured
State: this phrase includes both its rights in the subject
matter of the dispute and its right to take countermeasures.
Temporary stay orders, the temporary freezing of assets
and similar measures could fall within paragraph 2,
depending on the circumstances.
(7)  Paragraph 3 deals with the case in which the wrongful
act has ceased and the dispute is submitted to a court
or tribunal which has the authority to decide it with binding
effect for the parties. In such a case, and for so long
as the dispute settlement procedure is being implemented
in good faith, unilateral action by way of countermeasures
is not justified. Once the conditions in paragraph 3
are met, the injured State may not take countermeasures;
if already taken, they must be suspended “without undue
delay”. The phrase “without undue delay” allows a limited
tolerance for the arrangements required to suspend
the measures in question.
(8)  A dispute is not “pending before a court or tribunal”
for the purposes of paragraph 3 (b) unless the court or
tribunal exists and is in a position to deal with the case.
For these purposes a dispute is not pending before an ad
hoc tribunal established pursuant to a treaty until the tribunal
is actually constituted, a process which will take
some time even if both parties are cooperating in the appointment
of the members of the tribunal.789 Paragraph
3 is based on the assumption that the court or tribunal to
which it refers has jurisdiction over the dispute and also
the power to order provisional measures. Such power is
a normal feature of the rules of international courts and
tribunals.790 The rationale behind paragraph 3 is that once
the parties submit their dispute to such a court or tribunal
for resolution, the injured State may request it to order
provisional measures to protect its rights. Such a request,
provided the court or tribunal is available to hear it, will
perform a function essentially equivalent to that of countermeasures.
Provided the order is complied with it will
789 Hence, paragraph 5 of article 290 of the United Nations Convention
on the Law of the Sea provides for ITLOS to deal with provisional
measures requests “[p]ending the constitution of an arbitral tribunal to
which the dispute is being submitted”.
790 The binding effect of provisional measures orders under Part XI
of the United Nations Convention on the Law of the Sea is assured
by paragraph 6 of article 290. For the binding effect of provisional
measures orders under Article 41 of the Statute of ICJ, see the decision
in LaGrand, Judgment (footnote 119 above), pp. 501–504,
paras. 99–104.
	 State responsibility	 137
make countermeasures unnecessary pending the decision
of the tribunal. The reference to a “court or tribunal” is
intended to refer to any third party dispute settlement procedure,
whatever its designation. It does not, however, refer
to political organs such as the Security Council. Nor
does it refer to a tribunal with jurisdiction between a private
party and the responsible State, even if the dispute
between them has given rise to the controversy between
the injured State and the responsible State. In such cases,
however, the fact that the underlying dispute has been
submitted to arbitration will be relevant for the purposes
of articles 49 and 51, and only in exceptional cases will
countermeasures be justified.791
(9)  Paragraph 4 of article 52 provides a further condition
for the suspension of countermeasures under paragraph
3. It comprehends various possibilities, ranging from an
initial refusal to cooperate in the procedure, for example
by non-appearance, through non-compliance with a provisional
measures order, whether or not it is formally binding,
through to refusal to accept the final decision of the
court or tribunal. This paragraph also applies to situations
where a State party fails to cooperate in the establishment
of the relevant tribunal or fails to appear before the tribunal
once it is established. Under the circumstances of
paragraph 4, the limitations to the taking of countermeasures
under paragraph 3 do not apply.
Article 53.  Termination of countermeasures
Countermeasures shall be terminated as soon as the
responsible State has complied with its obligations under
Part Two in relation to the internationally wrongful
act.
Commentary
(1)  Article 53 deals with the situation where the responsible
State has complied with its obligations of cessation
and reparation under Part Two in response to countermeasures
taken by the injured State. Once the responsible
State has complied with its obligations under Part Two, no
ground is left for maintaining countermeasures, and they
must be terminated forthwith.
(2)  The notion that countermeasures must be terminated
as soon as the conditions which justified them have ceased
is implicit in the other articles in this chapter. In view of
its importance, however, article 53 makes this clear. It underlines
the specific character of countermeasures under
article 49.
791 Under the Convention on the Settlement of Investment Disputes
between States and Nationals of other States, the State of nationality
may not bring an international claim on behalf of a claimant individual
or company “in respect of a dispute which one of its nationals and another
Contracting State shall have consented to submit or shall have
submitted to arbitration under this Convention, unless such other Contracting
State shall have failed to abide by and comply with the award
rendered in such dispute” (art. 27, para. 1); see C. H. Schreuer, The
ICSID Convention: A Commentary (Cambridge University Press, 2001)
pp. 397–414. This excludes all forms of invocation of responsibility
by the State of nationality, including the taking of countermeasures.
See paragraph (2) of the commentary to article 42.
Article 54.  Measures taken by States other
than an injured State
This chapter does not prejudice the right of any
State, entitled under article 48, paragraph 1, to invoke
the responsibility of another State, to take lawful measures
against that State to ensure cessation of the breach
and reparation in the interest of the injured State or of
the beneficiaries of the obligation breached.
Commentary
(1)  Chapter II deals with the right of an injured State
to take countermeasures against a responsible State in
order to induce that State to comply with its obligations
of cessation and reparation. However, “injured” States, as
defined in article 42, are not the only States entitled to
invoke the responsibility of a State for an internationally
wrongful act under chapter I of this Part. Article 48 allows
such invocation by any State, in the case of the breach of
an obligation to the international community as a whole,
or by any member of a group of States, in the case of
other obligations established for the protection of the collective
interest of the group. By virtue of article 48, paragraph
2, such States may also demand cessation and
performance in the interests of the beneficiaries of the
obligation breached. Thus, with respect to the obligations
referred to in article 48, such States are recognized as having
a legal interest in compliance. The question is to what
extent these States may legitimately assert a right to react
against unremedied breaches.792
(2)  It is vital for this purpose to distinguish between
individual measures, whether taken by one State or by a
group of States each acting in its individual capacity and
through its own organs on the one hand, and institutional
reactions in the framework of international organizations
on the other. The latter situation, for example where it
occurs under the authority of ChapterVII of the Charter of
the United Nations, is not covered by the articles.793 More
generally, the articles do not cover the case where action
is taken by an international organization, even though the
member States may direct or control its conduct.794
(3)  Practice on this subject is limited and rather embryonic.
In a number of instances, States have reacted against
what were alleged to be breaches of the obligations
referred to in article 48 without claiming to be individually
injured. Reactions have taken such forms as economic
sanctions or other measures (e.g. breaking off air links or
other contacts). Examples include the following:
792 See, e.g., M. Akehurst, “Reprisals by third States”, BYBIL,
1970, vol. 44, p. 1; J. I. Charney, “Third State remedies in international
law”, Michigan Journal of International Law, vol. 10, No. 1 (1989),
p. 57; Hutchinson, loc. cit. (footnote 672 above); Sicilianos, op. cit.
(footnote 735 above), pp. 110–175; B. Simma, “From bilateralism
to community interest in international law”, Collected Courses ...,
1994–VI (The Hague, Martinus Nijhoff, 1997), vol. 250, p. 217; and J.
A. Frowein, “Reactions by not directly affected States to breaches of
public international law”, Collected Courses ..., 1994–IV (Dordrecht,
Martinus Nijhoff, 1995), vol. 248, p. 345.
793 See article 59 and commentary.
794 See article 57 and commentary.
138	 Report of the International Law Commission on the work of its fifty-third session
United States-Uganda (1978). In October 1978, the
United States Congress adopted legislation prohibiting
exports of goods and technology to, and all imports
from, Uganda.795 The legislation recited that “[t]he
Government of Uganda … has committed genocide
against Ugandans” and that the “United States should
take steps to dissociate itself from any foreign government
which engages in the international crime of geno-
cide”.796
Certain Western countries-Poland and the Soviet
Union (1981). On 13 December 1981, the Polish
Government imposed martial law and subsequently
suppressed demonstrations and detained many dissidents.797
The United States and other Western countries
took action against both Poland and the Soviet Union.
The measures included the suspension, with immediate
effect, of treaties providing for landing rights of Aeroflot
in the United States and LOT in the United States,
Great Britain, France, the Netherlands, Switzerland
and Austria.798 The suspension procedures provided
for in the respective treaties were disregarded.799
Collective measures against Argentina (1982). In
April 1982, whenArgentina took control over part of the
FalklandIslands(Malvinas),theSecurityCouncilcalled
for an immediate withdrawal.800 Following a request by
the United Kingdom, European Community members,
Australia, Canada and New Zealand adopted trade sanctions.These
included a temporary prohibition on all imports
of Argentine products, which ran contrary to article
XI:1 and possibly article III of the General Agreement
on Tariffs and Trade. It was disputed whether the
measures could be justified under the national security
exception provided for in article XXI (b) (iii) of the
Agreement.801 The embargo adopted by the European
countries also constituted a suspension of Argentina’s
rights under two sectoral agreements on trade in textiles
and trade in mutton and lamb,802 for which security
exceptions of the Agreement did not apply.
795 Uganda Embargo Act, Public Law 95-435 of 10 October 1978,
United States Statutes at Large 1978, vol. 92, part 1 (Washington,
D.C., United States Government Printing Office, 1980), pp. 1051–
1053.
796 Ibid., sects. 5(a) and (b).
797 RGDIP, vol. 86 (1982), pp. 603–604.
798 Ibid., p. 606.
799 See, e.g., article 15 of the Air Transport Agreement between the
Government of the United States of America and the Government of
the Polish People’s Republic of 1972 (United States Treaties and Other
International Agreements, vol. 23, part 4 (1972), p. 4269); and article
17 of the United States-Union of Soviet Socialist Republics Civil Air
Transport Agreement of 1966, ILM, vol. 6, No. 1 (January 1967), p. 82
and vol. 7, No. 3 (May 1968), p. 571.
800 Security Council resolution 502 (1982) of 3 April 1982.
801 Western States’ reliance on this provision was disputed by other
GATT members; cf. communiqué of Western countries, GATT document
L. 5319/Rev.1 and the statements by Spain and Brazil, GATT
document C/M/157, pp. 5–6. For an analysis, see M. J. Hahn,
Die einseitige Aussetzung von GATT-Verpflichtungen als Repressalie
(Unilateral Suspension of GATT Obligations as Reprisal (English
summary)) (Berlin, Springer, 1996), pp. 328–334.
802 The treaties are reproduced in Official Journal of the European 
Communities, No. L 298 of 26 November 1979, p. 2; and No. L 275 of
18 October 1980, p. 14.
•
•
•
United States-South Africa (1986). When in 1985,
the Government of South Africa declared a state of
emergency in large parts of the country, the Security
Council recommended the adoption of sectoral economic
boycotts and the freezing of cultural and sports
relations.803 Subsequently, some countries introduced
measures which went beyond those recommended
by the Security Council. The United States Congress
adopted the Comprehensive Anti-Apartheid Act which
suspended landing rights of South African Airlines on
United States territory.804 This immediate suspension
was contrary to the terms of the 1947 United States of
America and Union of South Africa Agreement relating
to air services between their respective territories805
and was justified as a measure which should encourage
the Government of South Africa “to adopt reforms
leading to the establishment of a non-racial democ-
racy”.806
Collective measures against Iraq (1990). On 2 August
1990, Iraqi troops invaded and occupied Kuwait.
The Security Council immediately condemned the invasion.
European Community member States and the
United States adopted trade embargoes and decided to
freeze Iraqi assets.807 This action was taken in direct
response to the Iraqi invasion with the consent of the
Government of Kuwait.
Collective measures against the Federal Republic
of Yugoslavia (1998). In response to the humanitarian
crisis in Kosovo, the member States of the European
Community adopted legislation providing for the freezing
of Yugoslav funds and an immediate flight ban.808
For a number of countries, such as France, Germany
and the United Kingdom, the latter measure implied
thenon-performanceofbilateralaviationagreements.809
Because of doubts about the legitimacy of the action,
the British Government initially was prepared to follow
the one-year denunciation procedure provided for
in article 17 of its agreement with Yugoslavia. However,
it later changed its position and denounced flights
with immediate effect. Justifying the measure, it stated
that “President Milosevic’s ... worsening record on human
rights means that, on moral and political grounds,
he has forfeited the right of his Government to insist
upon the 12 months notice which would normally ap-
803 Security Council resolution 569 (1985) of 26 July 1985.
For further references, see Sicilianos, op. cit. (footnote 735 above),
p. 165.
804 For the text of this provision, see ILM, vol. 26, No. 1 (January
1987), p. 79 (sect. 306).
805 United Nations, Treaty Series, vol. 66, p. 239 (art. VI).
806 For the implementation order, see ILM (footnote 804 above),
p. 105.
807 See, e.g., President Bush’s Executive Orders of 2 August 1990,
reproduced in AJIL, vol. 84, No. 4 (October 1990), pp. 903–905.
808 Common positions of 7 May and 29 June 1998, Official Journal
of the European Communities, No. L 143 of 14 May 1998, p. 1 and
No. L 190 of 4 July 1998, p. 3; implemented through Council Regulations
1295/98, ibid., No. L 178 of 23 June 1998, p. 33 and 1901/98,
ibid., No. L 248 of 8 September 1998, p. 1.
809 See, e.g., United Kingdom, Treaty Series No. 10 (1960) (London,
HM Stationery Office, 1960); and Recueil des Traités et Accords de la
France, 1967, No. 69.
•
•
•
	 State responsibility	 139
ply”.810 The Federal Republic of Yugoslavia protested
these measures as “unlawful, unilateral and an example
of the policy of discrimination”.811
(4)  In some other cases, certain States similarly suspended
treaty rights in order to exercise pressure on States
violating collective obligations. However, they did not rely
on a right to take countermeasures, but asserted a right to
suspend the treaty because of a fundamental change of
circumstances. Two examples may be given:
Netherlands-Suriname (1982). In 1980, a military
Government seized power in Suriname. In response
to a crackdown by the new Government on opposition
movements in December 1982, the Dutch Government
suspended a bilateral treaty on development assistance
under which Suriname was entitled to financial subsidies.812
While the treaty itself did not contain any suspension
or termination clauses, the Dutch Government
stated that the human rights violations in Suriname
constituted a fundamental change of circumstances
which gave rise to a right of suspension.813
European Community member States-the Federal
Republic of Yugoslavia (1991). In the autumn of 1991,
in response to resumption of fighting within the Federal
Republic of Yugoslavia, European Community
members suspended and later denounced the 1983
Cooperation Agreement with Yugoslavia.814 This led
to a general repeal of trade preferences on imports
and thus went beyond the weapons embargo ordered
by the Security Council in resolution 713 (1991) of 25
September 1991. The reaction was incompatible with
the terms of the Cooperation Agreement, which did
not provide for the immediate suspension but only for
denunciation upon six months’ notice. Justifying the
suspension, European Community member States explicitly
mentioned the threat to peace and security in
the region. But as in the case of Suriname, they relied
on fundamental change of circumstances, rather than
asserting a right to take countermeasures.815
(5)  In some cases, there has been an apparent willingness
on the part of some States to respond to violations of
obligations involving some general interest, where those
810 BYBIL, 1998, vol. 69, p. 581; see also BYBIL, 1999, vol. 70,
pp. 555–556.
811 Statement of the Government of the Federal Republic of
Yugoslavia on the suspension of flights of Yugoslav Airlines of
10 October 1998. See M. Weller, The Crisis in Kosovo 1989-1999
(Cambridge, Documents & Analysis Publishing, 1999), p. 227.
812 Tractatenblad van het Koninkrijk der Nederlanden, No. 140
(1975). See H.-H. Lindemann, “The repercussions resulting from the
violation of human rights in Surinam on the contractual relations between
the Netherlands and Surinam”, Zeitschrift für ausländisches
öffentliches Recht und Völkerrecht, vol. 44 (1984), p. 64, at pp. 68–69.
813 R. C. R. Siekmann, “Netherlands State practice for the parliamentary
year 1982–1983”, NYIL, 1984, vol. 15, p. 321.
814 Official Journal of the European Communities, No. L 41 of
14 February 1983, p. 1; No. L 315 of 15 November 1991, p. 1, for
the suspension; and No. L 325 of 27 November 1991, p. 23, for the
denunciation.
815 See also the decision of the European Court of Justice in A. Racke
GmbH and Co. v. Hauptzollamt Mainz, case C-162/96, Reports of cases
before the Court of Justice and the Court of First Instance, 1998-6,
p. I–3655, at pp. 3706–3708, paras. 53–59.
•
•
States could not be considered “injured States” in the
sense of article 42. It should be noted that in those cases
where there was, identifiably, a State primarily injured
by the breach in question, other States have acted at the
request and on behalf of that State.816
(6)  As this review demonstrates, the current state of international
law on countermeasures taken in the general
or collective interest is uncertain. State practice is sparse
and involves a limited number of States. At present, there
appears to be no clearly recognized entitlement of States
referred to in article 48 to take countermeasures in the
collective interest. Consequently, it is not appropriate to
include in the present articles a provision concerning the
question whether other States, identified in article 48, are
permitted to take countermeasures in order to induce a
responsible State to comply with its obligations. Instead,
chapter II includes a saving clause which reserves the position
and leaves the resolution of the matter to the further
development of international law.
(7)  Article 54 accordingly provides that the chapter
on countermeasures does not prejudice the right of any
State, entitled under article 48, paragraph 1, to invoke the
responsibility of another State, to take lawful measures
against the responsible State to ensure cessation of the
breach and reparation in the interest of the injured State
or the beneficiaries of the obligation breached. The article
speaks of “lawful measures” rather than “countermeasures”
so as not to prejudice any position concerning
measures taken by States other than the injured State in
response to breaches of obligations for the protection of
the collective interest or those owed to the international
community as a whole.
Part Four
GENERAL PROVISIONS
This Part contains a number of general provisions applicable
to the articles as a whole, specifying either their
scope or certain matters not dealt with. First, article 55
makes it clear by reference to the lex specialis principle
that the articles have a residual character. Where some
matter otherwise dealt with in the articles is governed by
a special rule of international law, the latter will prevail to
the extent of any inconsistency. Correlatively, article 56
makes it clear that the articles are not exhaustive, and that
they do not affect other applicable rules of international
law on matters not dealt with. There follow three saving
clauses. Article 57 excludes from the scope of the articles
questions concerning the responsibility of international
organizations and of States for the acts of international
organizations. The articles are without prejudice to any
question of the individual responsibility under international
law of any person acting on behalf of a State, and
this is made clear by article 58. Finally, article 59 reserves
the effects of the Charter of the United Nations itself.
816 Cf. Military and Paramilitary Activities in and against Nicaragua
(footnote 36 above) where ICJ noted that action by way of collective selfdefence
could not be taken by a third State except at the request of the
State subjected to the armed attack (p. 105, para. 199).
140	 Report of the International Law Commission on the work of its fifty-third session
Article 55.  Lex specialis
These articles do not apply where and to the extent
that the conditions for the existence of an internationally
wrongful act or the content or implementation of
the international responsibility of a State are governed
by special rules of international law.
Commentary
(1)  When defining the primary obligations that apply
between them, States often make special provision for
the legal consequences of breaches of those obligations,
and even for determining whether there has been such
a breach. The question then is whether those provisions
are exclusive, i.e. whether the consequences which would
otherwise apply under general international law, or the
rules that might otherwise have applied for determining a
breach, are thereby excluded. A treaty may expressly provide
for its relationship with other rules. Often, however,
it will not do so and the question will then arise whether
the specific provision is to coexist with or exclude the
general rule that would otherwise apply.
(2)  Article 55 provides that the articles do not apply
where and to the extent that the conditions for the existence
of an internationally wrongful act or its legal consequences
are determined by special rules of international
law. It reflects the maxim lex specialis derogat legi generali.
Although it may provide an important indication,
this is only one of a number of possible approaches towards
determining which of several rules potentially applicable
is to prevail or whether the rules simply coexist.
Another gives priority, as between the parties, to the rule
which is later in time.817 In certain cases the consequences
that follow from a breach of some overriding rule may
themselves have a peremptory character. For example,
States cannot, even as between themselves, provide for
legal consequences of a breach of their mutual obligations
which would authorize acts contrary to peremptory norms
of general international law. Thus, the assumption of article
55 is that the special rules in question have at least
the same legal rank as those expressed in the articles. On
that basis, article 55 makes it clear that the present articles
operate in a residual way.
(3)  It will depend on the special rule to establish the extent
to which the more general rules on State responsibility
set out in the present articles are displaced by that rule.
In some cases, it will be clear from the language of a treaty
or other text that only the consequences specified are
to flow. Where that is so, the consequence will be “determined”
by the special rule and the principle embodied
in article 55 will apply. In other cases, one aspect of the
general law may be modified, leaving other aspects still
applicable. An example of the former is the WTO Understanding
on Rules and Procedures governing the Settlement
of Disputes as it relates to certain remedies.818 An
817 See paragraph 3 of article 30 of the 1969 Vienna Convention.
818 See Marrakesh Agreement establishing the World Trade Organization,
annex 2, especially art. 3, para. 7, which provides for compensation
“only if the immediate withdrawal of the measure is impractical
and as a temporary measure pending the withdrawal of the measure
example of the latter is article 41 of Protocol No. 11 to
the European Convention on Human Rights.819 Both concern
matters dealt with in Part Two of the articles. The
same considerations apply to Part One. Thus, a particular
treaty might impose obligations on a State but define the
“State” for that purpose in a way which produces different
consequences than would otherwise flow from the rules
of attribution in chapter II.820 Or a treaty might exclude a
State from relying on force majeure or necessity.
(4)  For the lex specialis principle to apply it is not enough
that the same subject matter is dealt with by two provisions;
there must be some actual inconsistency between
them, or else a discernible intention that one provision is
to exclude the other. Thus, the question is essentially one
of interpretation. For example, in the Neumeister case, the
European Court of Human Rights held that the specific
obligation in article 5, paragraph 5, of the European Convention
on Human Rights for compensation for unlawful
arrest or detention did not prevail over the more general
provision for compensation in article 50. In the Court’s
view, to have applied the lex specialis principle to article
5, paragraph 5, would have led to “consequences incompatible
with the aim and object of the Convention”.821 It
was sufficient, in applying article 50, to take account of
the specific provision.822
(5)  Article 55 is designed to cover both “strong” forms
of lex specialis, including what are often referred to as
self-contained regimes, as well as “weaker” forms such as
specific treaty provisions on a single point, for example,
a specific treaty provision excluding restitution. PCIJ referred
to the notion of a self-contained regime in the S.S.
“Wimbledon” case with respect to the transit provisions
concerning the Kiel Canal in the Treaty of Versailles,823
which is inconsistent with a covered agreement”. For WTO purposes,
“compensation” refers to the future conduct, not past conduct, and involves
a form of countermeasure. See article 22 of the Understanding.
On the distinction between cessation and reparation for WTO purposes,
see, e.g., Report of the Panel, Australia–Subsidies Provided to Producers
and Exporters of Automotive Leather (footnote 431 above).
819 See paragraph (2) of the commentary to article 32.
820 Thus, article 1 of the Convention against Torture and Other Cruel,
Inhuman or Degrading Treatment or Punishment only applies to torture
committed “by or at the instigation of or with the consent or acquiescence
of a public official or other person acting in an official capacity”.
This is probably narrower than the bases for attribution of conduct to
the State in Part One, chapter II. Cf. “federal” clauses, allowing certain
component units of the State to be excluded from the scope of a treaty
or limiting obligations of the federal State with respect to such units
(e.g. article 34 of the Convention for the Protection of the World Cultural
and Natural Heritage).
821 Neumeister v. Austria, Eur. Court H.R., Series A, No. 17 (1974),
paras. 28–31, especially para. 30.
822 See also Mavrommatis (footnote 236 above), pp. 29–33; Marcu
Colleanu v. German State, Recueil des décisions des tribunaux arbitraux
mixtes institués par les traités de paix (Paris, Sirey, 1930),
vol. IX, p. 216 (1929); WTO, Report of the Panel, Turkey–Restrictions
on Imports of Textile and Clothing Products (footnote 130 above),
paras. 9.87–9.95; Case concerning a dispute between Argentina and
Chile concerning the Beagle Channel, UNRIAA, vol. XXI (Sales
No. E/F. 95.V.2), p. 53, at p. 100, para. 39 (1977). See further C.W. Jenks,
“The conflict of law‑making treaties”, BYBIL, 1953, vol. 30, p. 401;
M. McDougal, H. D. Lasswell and J. C. Miller, The Interpretation of 
International Agreements and World Public Order: Principles of
Content and Procedure (New Haven Press, 1994), pp. 200–206; and
P. Reuter, Introduction to the Law of Treaties (footnote 300 above),
para. 201.
823 S.S. “Wimbledon” (see footnote 34 above), pp. 23–24.
	 State responsibility	 141
as did ICJ in the United States Diplomatic and Consular
Staff in Tehran case with respect to remedies for abuse of
diplomatic and consular privileges.824
(6)  The principle stated in article 55 applies to the articles
as a whole. This point is made clear by the use of
language (“the conditions for the existence of an internationally
wrongful act or the content or implementation of
the international responsibility of a State”) which reflects
the content of each of Parts One, Two and Three.
Article 56.  Questions of State responsibility
not regulated by these articles
The applicable rules of international law continue
to govern questions concerning the responsibility of a
State for an internationally wrongful act to the extent
that they are not regulated by these articles.
Commentary
(1)  The present articles set out by way of codification
and progressive development the general secondary rules
of State responsibility. In that context, article 56 has two
functions. First, it preserves the application of the rules
of customary international law concerning State responsibility
on matters not covered by the articles. Secondly,
it preserves other rules concerning the effects of a breach
of an international obligation which do not involve issues
of State responsibility but stem from the law of treaties
or other areas of international law. It complements the lex
specialis principle stated in article 55. Like article 55, it
is not limited to the legal consequences of wrongful acts
but applies to the whole regime of State responsibility set
out in the articles.
(2)  As to the first of these functions, the articles do not
purport to state all the consequences of an internationally
wrongful act even under existing international law and
there is no intention of precluding the further development
of the law on State responsibility. For example, the
principle of law expressed in the maxim ex injuria jus non
oritur may generate new legal consequences in the field
of responsibility.825 In this respect, article 56 mirrors the
preambular paragraph of the 1969 Vienna Convention
which affirms that “the rules of customary international
law will continue to govern questions not regulated by the
provisions of the present Convention”. However, matters
of State responsibility are not only regulated by customary
824 United States Diplomatic and Consular Staff in Tehran (see
footnote 59 above), at p. 40, para. 86. See paragraph (15) of the commentary
to article 50 and also B. Simma, “Self-contained regimes”,
NYIL, 1985, vol. 16, p. 111.
825 Another possible example, related to the determination whether
there has been a breach of an international obligation, is the so-called
principle of “approximate application”, formulated by Sir Hersch
Lauterpacht in Admissibility of Hearings of Petitioners by the Committee
on South West Africa, Advisory Opinion, I.C.J. Reports 1956, p. 23,
at p. 46. In the Gabˇcíkovo-Nagymaros Project case (see footnote 27
above), the Court said that “even if such a principle existed, it could by
definition only be employed within the limits of the treaty in question”
(p. 53, para. 76). See also S. Rosenne, Breach of Treaty (footnote 411
above), pp. 96–101.
international law but also by some treaties; hence article
56 refers to the “applicable rules of international law”.
(3)  A second function served by article 56 is to make
it clear that the present articles are not concerned with
any legal effects of a breach of an international obligation
which do not flow from the rules of State responsibility,
but stem from the law of treaties or other areas of law.
Examples include the invalidity of a treaty procured by
an unlawful use of force,826 the exclusion of reliance on
a fundamental change of circumstances where the change
in question results from a breach of an international obligation
of the invoking State to any other State party,827 or
the termination of the international obligation violated in
the case of a material breach of a bilateral treaty.828
Article 57.  Responsibility of an international
organization
These articles are without prejudice to any question
of the responsibility under international law of an international
organization, or of any State for the conduct
of an international organization.
Commentary
(1)  Article 57 is a saving clause which reserves two related
issues from the scope of the articles. These concern,
first, any question involving the responsibility of international
organizations, and secondly, any question concerning
the responsibility of any State for the conduct of an
international organization.
(2)  In accordance with the articles prepared by the Commission
on other topics, the expression “international or-
ganization”meansan“intergovernmentalorganization”.829
Such an organization possesses separate legal personality
under international law,830 and is responsible for its own
acts, i.e. for acts which are carried out by the organization
through its own organs or officials.831 By contrast, where
a number of States act together through their own organs
as distinct from those of an international organization,
the conduct in question is that of the States concerned,
in accordance with the principles set out in chapter II of
Part One. In such cases, as article 47 confirms, each State
remains responsible for its own conduct.
826 1969 Vienna Convention, art. 52.
827 Ibid., art. 62, para. 2 (b).
828 Ibid., art. 60, para 1.
829 See article 2, paragraph 1 (i), of the Vienna Convention on the
Law of Treaties between States and International Organizations or
between International Organizations (hereinafter “the 1986 Vienna
Convention”).
830 A firm foundation for the international personality of the
United Nations is laid in the advisory opinion of the Court in Reparation
for Injuries (see footnote 38 above), at p. 179.
831 As the Court has observed, “the question of immunity from legal
process is distinct from the issue of compensation for any damages
incurred as a result of acts performed by the United Nations or
by its agents acting in their official capacity. The United Nations may
be required to bear responsibility for the damage arising from such
acts”, Difference Relating to Immunity from Legal Process of a Special 
Rapporteur of the Commission on Human Rights (see footnote 56
above).
142	 Report of the International Law Commission on the work of its fifty-third session
(3)  Just as a State may second officials to another State,
putting them at its disposal so that they act for the purposes
of and under the control of the latter, so the same
could occur as between an international organization and
a State. The former situation is covered by article 6. As
to the latter situation, if a State seconds officials to an
international organization so that they act as organs or officials
of the organization, their conduct will be attributable
to the organization, not the sending State, and will
fall outside the scope of the articles. As to the converse
situation, in practice there do not seem to be convincing
examples of organs of international organizations which
have been “placed at the disposal of” a State in the sense
of article 6,832 and there is no need to provide expressly
for the possibility.
(4)  Article 57 also excludes from the scope of the articles
issues of the responsibility of a State for the acts of an
international organization, i.e. those cases where the international
organization is the actor and the State is said to
be responsible by virtue of its involvement in the conduct
of the organization or by virtue of its membership of the
organization. Formally, such issues could fall within the
scope of the present articles since they concern questions
of State responsibility akin to those dealt with in chapter
IV of Part One. But they raise controversial substantive
questions as to the functioning of international organizations
and the relations between their members, questions
which are better dealt with in the context of the law of
international organizations.833
(5)  On the other hand article 57 does not exclude from
the scope of the articles any question of the responsibility
of a State for its own conduct, i.e. for conduct attributable
to it under chapter II of Part One, not being conduct
performed by an organ of an international organization. In
this respect the scope of article 57 is narrow. It covers only
what is sometimes referred to as the derivative or second-
832 Cf. Yearbook ... 1974, vol. II (Part One), pp. 286–290. The High
Commissioner for the Free City of Danzig was appointed by the League
of Nations Council and was responsible to it; see Treatment of Polish
Nationals (footnote 75 above). Although the High Commissioner exercised
powers in relation to Danzig, it is doubtful that he was placed at
the disposal of Danzig within the meaning of article 6. The position of
the High Representative, appointed pursuant to annex 10 of the General
Framework Agreement for Peace in Bosnia and Herzegovina of 14 December
1995, is also unclear. The Constitutional Court of Bosnia and
Herzegovina has held that the High Representative has a dual role, both
as an international agent and as an official in certain circumstances acting
in and for Bosnia and Herzegovina; in the latter respect, the High
Representative’s acts are subject to constitutional control. See Case U
9/00 on the Law on the State Border Service, Official Journal of Bosnia
and Herzegovina, No. 1/01 of 19 January 2001.
833 This area of international law has acquired significance following
controversies, inter alia, over the International Tin Council: J. H.
Rayner (Mincing Lane) Ltd. v. Department of Trade and Industry, case
2 A.C. 418 (1990) (England, House of Lords); Maclaine Watson and
Co., Ltd. v. Council and Commission of the European Communities,
case C-241/87, Reports of cases before the Court of Justice and the
Court of First Instance, 1990-5, p. I–1797; and the Arab Organization
for Industrialization (Westland Helicopters Ltd. v. Arab Organization
for Industrialization, ILR, vol. 80, p. 595 (1985) (International Chamber
of Commerce Award); Arab Organization for Industrialization v.
Westland Helicopters Ltd., ibid., p. 622 (1987) (Switzerland, Federal
Supreme Court); Westland Helicopters Ltd. v. Arab Organization for
Industrialization, ibid., vol. 108, p. 564 (1994) (England, High Court).
See also Waite and Kennedy v. Germany, Eur. Court H.R., Reports,
1999–I, p. 393 (1999).
ary liability of member States for the acts or debts of an
international organization.834
Article 58.  Individual responsibility
These articles are without prejudice to any question
of the individual responsibility under international
law of any person acting on behalf of a State.
Commentary
(1)  Article 58 makes clear that the articles as a whole
do not address any question of the individual responsibility
under international law of any person acting on behalf
of a State. It clarifies a matter which could be inferred in
any case from the fact that the articles only address issues
relating to the responsibility of States.
(2)  The principle that individuals, including State officials,
may be responsible under international law was
established in the aftermath of the Second World War. It
was included in the London Charter of 1945 which established
the Nuremberg Tribunal835 and was subsequently
endorsed by the General Assembly.836 It underpins more
recent developments in the field of international criminal
law, including the two ad hoc tribunals and the Rome
Statute of the International Criminal Court.837 So far this
principle has operated in the field of criminal responsibility,
but it is not excluded that developments may occur in
the field of individual civil responsibility.838 As a saving
clause, article 58 is not intended to exclude that possibility;
hence the use of the general term “individual respon-
sibility”.
(3)  Where crimes against international law are committed
by State officials, it will often be the case that the State
itself is responsible for the acts in question or for failure
to prevent or punish them. In certain cases, in particular
aggression, the State will by definition be involved. Even
so, the question of individual responsibility is in principle
distinct from the question of State responsibility.839 The
834 See the work of the Institute of International Law under R. Higgins,
Yearbook of the Institute of International Law, vol. 66–I (1995),
p. 251, and vol. 66–II (1996), p. 444. See also P. Klein, La responsabilité
des organisations internationales dans les ordres juridiques internes et
en droit des gens (Brussels, Bruylant Editions de l’Université de Bruxelles,
1998). See further WTO, Report of the Panel, Turkey: Restrictions
on Imports of Textile and Clothing Products (footnote 130).
835 See footnote 636 above.
836 General Assembly resolution 95 (I) of 11 December 1946. See
also the Principles of International Law recognized in the Charter of the
Nürnberg Tribunal and in the Judgment of the Tribunal, elaborated by
the International Law Commission, Yearbook ... 1950, vol. II, p. 374,
document A/1316.
837 See paragraph (6) of the commentary to chapter III of Part Two.
838 See, e.g., article 14 of the Convention against Torture and Other
Cruel, Inhuman or Degrading Treatment or Punishment, dealing with
compensation for victims of torture.
839 See, e.g., Streletz, Kessler and Krenz v. Germany (application
Nos. 34044/96, 35532/97 and 44801/98), judgment of 22 March 2001,
Eur. Court H.R., Reports, 2001–II: “If the GDR still existed, it would
be responsible from the viewpoint of international law for the acts concerned.
It remains to be established that alongside that State responsibility
the applicants individually bore criminal responsibility at the
material time” (para. 104).
	 State responsibility	 143
State is not exempted from its own responsibility for internationally
wrongful conduct by the prosecution and punishment
of the State officials who carried it out.840 Nor
may those officials hide behind the State in respect of
their own responsibility for conduct of theirs which is contrary
to rules of international law which are applicable to
them. The former principle is reflected, for example, in article
25, paragraph 4, of the Rome Statute of the International
Criminal Court, which provides that: “[n]o provision
in this Statute relating to individual criminal responsibility
shall affect the responsibility of States under
international law.” The latter is reflected, for example, in
the well-established principle that official position does
not excuse a person from individual criminal responsibility
under international law.841
(4)  Article 58 reflects this situation, making it clear that
the articles do not address the question of the individual
responsibility under international law of any person acting
on behalf of a State. The term “individual responsibility”
has acquired an accepted meaning in the light of the Rome
Statute and other instruments; it refers to the responsibility
of individual persons, including State officials, under
certain rules of international law for conduct such as genocide,
war crimes and crimes against humanity.
840 Prosecution and punishment of responsible State officials may be
relevant to reparation, especially satisfaction: see paragraph (5) of the
commentary to article 36.
841 See, e.g., the Principles of International Law recognized in the
Charter of the Nürnberg Tribunal and in the Judgment of the Tribunal,
Principle III (footnote 836 above), p. 375; and article 27 of the Rome
Statute of the International Criminal Court.
Article 59.  Charter of the United Nations
These articles are without prejudice to the Charter
of the United Nations.
Commentary
(1)  In accordance with Article 103 of the Charter of the
United Nations, “[i]n the event of a conflict between the
obligations of the Members of the United Nations under
the present Charter and their obligations under any
other international agreement, their obligations under the
present Charter shall prevail”. The focus of Article 103 is
on treaty obligations inconsistent with obligations arising
under the Charter. But such conflicts can have an incidence
on issues dealt with in the articles, as for example
in the Lockerbie cases.842 More generally, the competent
organs of the United Nations have often recommended or
required that compensation be paid following conduct by
a State characterized as a breach of its international obligations,
and article 103 may have a role to play in such
cases.
(2)  Article 59 accordingly provides that the articles cannot
affect and are without prejudice to the Charter of the
United Nations. The articles are in all respects to be interpreted
in conformity with the Charter.
842 Questions of Interpretation and Application of the 1971 
Montreal Convention arising from the Aerial Incident at Lockerbie
(Libyan Arab Jamahiriya v. United Kingdom), Provisional 
Measures, Order of 14 April 1992, I.C.J. Reports 1992, p. 3; (Libyan 
Arab Jamahiriya v. United States of America), ibid., p. 114.