title: (Ir-)Relevance of ius cogens ? Legal Consequences of ius cogens in Russia’s War of Aggression Against Ukraine
abstract: I. Ius cogens at Stake, What Role for ius cogens? 462 II. The Invalidating Effect of ius cogens on Conflicting Legal Acts 465 1. The Ordinary, Narrow Interpretation of 'Conflict' 466 2. A Broader Interpretation of 'Conflict'? 467 III. Ius cogens and Aggravated State Responsibility 470 1. The Threshold of Seriousness of the ius cogens Breach 471 2. Obligations of Non-Recognition and Non-Assistance 472 a) Non-Recognition as Lawful of the Situation Created by a Serious ius cogens Breach 472 b) Non-
journal: Zeitschrift für ausländisches öffentliches Recht und Völkerrecht / Heidelberg Journal of International Law