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Max Planck Encyclopedia of Public International Law [MPEPIL]

Neighbour States

Laurence Boisson de Chazournes, Danio Campanelli

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2022. All Rights Reserved.date: 17 August 2022

Regional co-operation — Comity

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 In today’s world the overwhelming majority of frontiers are clearly established (Boundaries). As stated by the International Court of Justice (ICJ) in the Territorial Dispute Case (Libyan Arab Jamahiriya/Chad), ‘to define a territory is to define its frontiers’ (para. 52).2 Each and every State is surrounded by frontiers—whether they are terrestrial, aerial, subterranean, or maritime—delimiting the portion of territory where a sovereign power is exclusively installed (see also States, Sovereign Equality). Most of these frontiers are common between neighbour...
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