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Max Planck Encyclopedia of Public International Law [MPEPIL]

Vienna Convention on the Law of Treaties (1969)

Anthony Aust†

Content type:
Encyclopedia entries
Product:
Max Planck Encyclopedias of International Law [MPIL]

Module:
Max Planck Encyclopedia of Public International Law [MPEPIL]
Article last updated:
June 2006

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2023. All Rights Reserved.date: 30 March 2023

Subject(s):
Customary international law — Vienna Convention on the Law of Treaties — State succession, international agreements — Travaux préparatoires — Treaties, amendments and modification — Treaties, conclusion — Treaties, entry into force — Codification — Peremptory norms / ius cogens

Published under the auspices of the Max Planck Institute for Comparative Public Law and International Law under the direction of Professor Anne Peters (2021–) and Professor Rüdiger Wolfrum (2004–2020). 

1 The law of treaties is the body of rules which govern what is a treaty, how it is made and brought into force, amended, terminated, and generally operates. Apart from issues of ius cogens, it is not concerned with the substance of a treaty (the rights and obligations created by it), which is known as treaty law. Although the Vienna Convention on the Law of Treaties (‘VCLT’) does not occupy the whole ground of the law of treaties, it covers the most important areas and is the indispensable starting point for any description of the law. For good reason, the VCLT...
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