The scope of the Convention is limited. It applies only to treaties concluded between states, so it does not cover agreements between states and international organizations or between international organizations themselves. However, agreements between states and international organizations, or between international organizations themselves, will be governed by the 1986 Vienna Convention on the Law of Treaties between States and International Organizations or Between International Organizations if it ever enters into force. Also, in treaties between states and international organizations, the terms of the Convention still apply between the state members. The Convention does not apply to agreements not in written form.