Jurisdictional Displacement At The Frontiers: Aggression, Command, And The Restructuring Of Functional Immunity
Ezekiel Osei, Adjunct Lecturer, Faculty of Law, Kwame Nkrumah University of Science & Technology
ABSTRACT
This paper addresses the conceptual fragmentation underlying the recent wave of domestic and international jurisprudence narrowing the functional immunity (immunity ratione materiae) of foreign state officials. It argues that the relationship between official immunity and international crimes is governed by a single, unified principle of jurisdictional displacement. Under this framework, immunity yields not because international crimes are conceptually “private” acts, nor because the underlying prohibitions possess a jus cogens character, but because international law has conferred a specific rule of criminal jurisdiction that inherently contemplates the prosecution of state actors. Consequently, the later jurisdictional rule must be interpreted as having structurally displaced the prior rule of immunity. Specifically, the paper addresses the crime of aggression, demonstrating that once displacement is uncoupled from the strict requirement of universal jurisdiction, the territorial jurisdiction of a state can successfully displace functional immunity for leadership crimes. Additionally, it dismantles the brief, rank-based qualification that entered German jurisprudence, proving it irreconcilable with the customary architecture of command responsibility under international humanitarian law. And finally, it resolves the hybridity problem by assessing the capacity of internationalised tribunals to suspend or override the personal immunity (immunity ratione personae) of serving leaders. Ultimately, through a sustained engagement with the jurisprudence of the German Federal Court of Justice, the head-of-state enforcement practices of the International Criminal Court, and the territorial architecture of the newly established Special Tribunal for the Crime of Aggression against Ukraine, the paper demonstrates how these seemingly distinct developments coalesce into a coherent structural shift that fundamentally reorders the relationship between state sovereignty and individual accountability within the contemporary law of armed conflict.
Keywords: functional immunity; crime of aggression; international humanitarian law; hybrid criminal tribunals; ILC Draft Article 7.
