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Max Planck Encyclopedia of Public International Law [MPEPIL]


Oliver Dörr

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2015. All Rights Reserved.date: 28 October 2020

Secession — Customary international law — State succession, international agreements — Unilateral acts — Jurisdiction of states, nationality principle — State succession, state property and contracts — Territory, acquisition and transfer

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

1 Cession is an understanding under international law by which territory is transferred from one State to another with the consent of both States. It is one of the modes by which States can lawfully acquire territory (Territory, Acquisition), and since it is based on mutual consent, it is presumably today the mode having the greatest practical relevance. As it necessarily entails a change of territory, cession entails a case of State succession, ie of the replacement of one State by another in the responsibility for the international relations of the territory...
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