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Part IX The law of responsibility, 27 Multilateral public order and issues of responsibility

James Crawford SC, FBA

From: Brownlie's Principles of Public International Law (9th Edition)

James Crawford

From: Oxford Public International Law (http://opil.ouplaw.com). (c) Oxford University Press, 2023. All Rights Reserved.date: 25 May 2024

Peremptory norms / ius cogens — Responsibility of states — Responsibility of individuals — Responsibility of international organizations — Countermeasures — Erga omnes obligations

International law has remained imprecise with respect to the scope and consequences of serious, systemic illegality, but there have been developments that have made collective action under law possible. The chapter reviews the objective consequences of illegal acts, covering peremptory norms (ius cogens), the obligation not to recognize a situation as lawful, and the obligation of putting an end to an unlawful situation.

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