Article 59 Vienna Convention on the Law of Treaties
Termination or suspension of the operation of a treaty implied by conclusion of a later treaty
1. A treaty shall be considered as terminated if all the parties to it conclude a later treaty relating to the same subject matter and:
(a) it appears from the later treaty or is otherwise established that the parties intended that the matter
should be governed by that treaty; or
(b) the provisions of the later treaty are so far incompatible with those of the earlier one that the two treaties are not capable of being applied at the same time.
2. The earlier treaty shall be considered as only suspended in operation if it appears from the later treaty or is otherwise established that such was the intention of the parties.
See also: Article 58 Vienna Convention on the Law of Treaties
