Vienna Convention
The Vienna Convention on the Law of Treaties (1969) is an international treaty setting out the framework for the formation and effects of treaties between states. Since coming into force on January 27, 1980, the Convention has been ratified by 113 member states; even those countries which are not party to the Convention nevertheless recognize it as the preeminent “Treaty of Treaties”, and binding on them as such. The Vienna Convention may also refer to the number of treaties signed in Vienna, including the Vienna Convention on Diplomatic Relations (1961), the Vienna Convention on Consular Relations (1963), the United Nations Convention on Contracts for the International Sale of Goods (1980), and the Vienna Convention on the Law of Treaties between States and International Organizations or Between International Organizations (1986).