Saturday, February 13, 2021
The Vienna Convention on the Law of Treaties between States and International Organizations or between International Organizations regulates treaties excluded from the scope of the Vienna Convention on the Law of Treaties (VCLT). The VCLT applies only applies to agreements between States. The VCLT for IOs (International Organizations) recognizes the capacity of international organizations to conclude treaties necessary for the exercise of their functions and fulfillment of their purposes.
The VCLT for IOs considers treaties between States and international organizations or between organizations as a useful means of developing international relations and ensuring conditions for peaceful cooperation. The VCLT of IOs regulates the conclusion and entry into force of treaties, observance, application and interpretation of treaties, amendment and modification of treaties, and finally the invalidity, termination, and suspension of treaties. In its miscellaneous provisions the Convention deals with its relationship between the VCLT and the VCLT for IOs, as well as questions arising from succession of States, the outbreak of hostilities between States, or the termination of an international organization.
Click here for the status table for the VCLT for IOs. In addition to the list of states that have ratified the VCLT for IOs, it's fascinating to see the list of international organizations that have ratified (or signed and not yet ratified) the VCLT for IOs.