79. Reservations.

A reservation is a unilateral statement, however phrased or named, made by a state when signing1, ratifying, accepting, approving2 or acceding3 to a treaty4, whereby it purports to exclude or to modify the legal effect of certain provisions of the treaty in their application to that state5. The subject matter of a reservation is commonly a restriction of the obligations of the state making it, but exceptionally it may be a mere variation or even a purported undertaking of something more than the treaty text requires