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Max Planck Encyclopedia of Public International Law [MPEPIL]

Treaties, Amendment and Revision

Jan Klabbers

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2015. All Rights Reserved.date: 23 September 2020

Treaties, amendments and modification — Vienna Convention on the Law of Treaties — Treaties, conclusion — Treaties, entry into force — Object & purpose (treaty interpretation and) — Sovereignty — State practice — Unilateral acts — Customary international law — Soft law — UNCLOS (UN Convention on the Law of the Sea)

Published under the auspices of the Max Planck Foundation for International Peace and the Rule of Law under the direction of Rüdiger Wolfrum.

1 It is sometimes said that it follows from the pacta sunt servanda norm, perhaps in conjunction with basic considerations of sovereignty (see also States, Sovereign Equality), that revision of treaties requires the unanimous consent of all parties. This undoubtedly holds true with respect to bilateral treaties: a proposal to amend may well be regarded as a new offer, requiring acceptance by the treaty partner (see also Treaties, Conclusion and Entry into Force). Much the same may generally also hold true with respect to multilateral treaties which are open to...
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