Part IX The Law of Responsibility, 27 Multilateral Public Order and Issues of Responsibility
James R Crawford
- Customary international law — Peremptory norms / ius cogens — International responsibility
This chapter begins with a discussion of how international law has remained imprecise with respect to the scope and consequences of serious, systemic illegality, and considers developments that have made collective action under law possible. It also 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.