Vienna Convention on the Law of Treaties Between States and International Organizations or Between International Organizations

The Vienna Convention on the Law of Treaties Between States and International Organizations or Between International Organizations is an international agreement that governs treaties involving international organizations. It was drafted by the United Nations' International Law Commission and adopted in 1986. This convention builds upon the 1969 Vienna Convention on the Law of Treaties, which specifically addresses treaties between states.12

The convention defines what constitutes a treaty, outlines rules for their conclusion, interpretation, and amendment, and details grounds for invalidating, terminating, or suspending them. It ensures that international agreements are written and governed by international law, promoting clarity and stability in international relations.231