914 international law
purports to exclude or to modify the legal effect of certain provisions of the
treaty in their application to that state.
57
Where a state is satisfied with most of the terms of a treaty, but is un-
happy about particular provisions, it may, in certain circumstances, wish
to refuse to accept or be bound by such provisions, while consenting to
the rest of the agreement. By the device of excluding certain provisions,
states may agree to be bound by a treaty which otherwise they might
reject entirely. This may have beneficial results in the cases of multilat-
eral conventions, by inducing as many states as possible to adhere to the
proposed treaty. To some extent it is a means of encouraging harmony
amongst states of widely differing social, economic and political systems,
by concentrating upon agreed, basic issues and accepting disagreement
on certain other matters.
The capacity of a state to make reservations to an international treaty
illustrates the principle of sovereignty of states, whereby a state may refuse
its consent to particular provisions so that they do not become binding
upon it. On the other hand, of course, to permit a treaty to become honey-
combed with reservations by a series of countries could well jeopardise the
Treaty Reservations’, Le Droit International `a l’Heure de sa Codifications, Milan, 1987, p. 313;
J. K. Gamble, ‘Reservations to Multilateral Treaties: A Macroscopic View of State Practice’,
74 AJIL, 1980, p. 372; G. Fitzmaurice, ‘Reservations to Multilateral Treaties’, 2 ICLQ, 1953,
p. 1; D. W. Bowett, ‘Reservations to Non-restricted Multilateral Treaties’, 48 BYIL, 1976–7,
p. 67; P. H. Imbert, Les R´eserves aux Trait´es Multilat´eraux, Paris, 1979; Sinclair, Vienna
Convention, chapter 3; D. W. Greig, ‘Reservations: Equity as a Balancing Force?’, 16 Aus-
tralian YIL, 1995, p. 21; O’Connell, International Law, pp. 229 ff.; J. M. Ruda, ‘Reservations
to Treaties’, 146 HR, 1975, p. 95; G. Horn, Reservations and Interpretative Declarations to
Multilateral Treaties, Leiden, 1988; Oppenheim’s International Law, p. 1241, and Nguyen
Quoc Dinh et al., Droit International Public, p. 178. See also A. Pellet, Reports on the
Law and Practice Relating to Reservations to Treaties, e.g. Report of the International Law
Commission, 2007, A/62/10, pp. 15 ff. The intention is to draw up a Guide to Practice
consisting of guidelines which, while not binding in themselves, might guide the practice
of states and international organisations with regard to reservations and interpretative
declarations on the basis of the Commission’s fundamental decision not to call into ques-
tion the work of the Vienna Conventions. The Draft Guidelines adopted to date may be
found at A/62/10, pp. 46 ff.
57
Article 2(1)d of the Vienna Convention on the Law of Treaties between States and In-
ternational Organisations, 1986 provides that a reservation means ‘a unilateral statement,
however phrased or named, made by a state or by an international organisation when sign-
ing, ratifying, formally confirming, accepting, approving or acceding to a treaty, whereby
it purports to exclude or to modify the legal effect of certain provisions of the treaty in
their application to that state or to that organisation’. See also the definition contained in
draft guideline 1.1 of the ILC Guide to Practice, Report of the ILC on its 54th Session,
2002, p. 50.