Reservation, Objection and Declaration
A reservation is a declaration made by a state by which it purports to exclude or alter the legal effect of certain provisions of the treaty in their application to that state. A reservation enables a state to accept a multilateral treaty as a whole by giving it the possibility not to apply certain provisions with which it does not want to comply. Reservations can be made when the treaty is signed, ratified, accepted, approved or acceded to. Reservations must not be incompatible with the object and the purpose of the treaty. Furthermore, a treaty might prohibit reservations or only allow for certain reservations to be made. [Arts.2 (1) (d) and 19-23, Vienna Convention of the Law of Treaties 1969] Any signatory or contracting state has the option of objecting to a reservation, inter alia, if, in its opinion, the reservation is incompatible with the object and purpose of the treaty. The objecting state may further declare that its objection has the effect of precluding the entry into force of the treaty as between objecting and reserving states. [Art.20-23, Vienna Convention on the Law of Treaties 1969] Sometimes states make declarations as to their understanding of some matter or as to the interpretation of a particular provision. Unlike reservations, declarations merely clarify the state's position and do not purport to exclude or modify the legal effect of a treaty. Usually, declarations are made at the time of the deposit of the corresponding instrument or at the time of signature.