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Vienna Convention on the Law of Treaties 1969 . Done at Vienna on 23 May 1969. Entered into force on 27 January 1980. United Nations, Treaty Series, vol. 1155, p. 331. Copyright ©...
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The Vienna Convention on the Law of Treaties (VCLT) is an international agreement that regulates treaties among sovereign states. Known as the "treaty on treaties", the VCLT establishes comprehensive, operational guidelines, rules, and procedures for how treaties are drafted, defined, amended, and interpreted. [3]
- Ratification by 35 states
- 23 May 1969
- 27 January 1980
- Vienna
May 16, 2024 · Vienna Convention on the Law of Treaties, an international agreement governing treaties between states that was drafted by the United Nations International Law Commission, was adopted in 1969, and entered into force after being ratified by 35 states in 1980. Learn about the background and provisions of the convention.
- Pat Bauer
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The Vienna Convention is a cornerstone of modern international relations and international law and is almost universally ratified and observed; it is considered one of the most successful legal instruments drafted under the United Nations.
- Ratification by 22 states
- 18 April 1961
- 24 April 1964
- Vienna
Article 2 Use of terms. 1. For the purposes of the present Convention: a. “treaty” means an international agreement concluded between States in written form and governed by international law, whether embodied in a single instrument or in two or more related instruments and whatever its particular designation; b.
