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Max Planck Encyclopedia of Public International Law [MPEPIL]

Advisory Opinions

Hugh Thirlway†

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2023. All Rights Reserved.date: 22 January 2025

Subject(s):
Advisory opinions — International organizations, practice and procedure

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 An advisory opinion is a judicial opinion, most frequently given by a standing international tribunal (International Court of Justice [ICJ]; Permanent Court of International Justice [PCIJ]) on a legal question which is frequently, but need not be, related to a current international dispute. In the case of standing tribunals, their statutes provide for such opinions to be given at the request of a defined class of international bodies rather than of States. An essential characteristic of advisory opinions is, as the term implies, that they constitute advice, ie...
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