Abstract In recent years, the ICJ has had to deal more and more often with alleged violations of major human rights treaties and the respective compromissory clauses contained in such treaties. Yet, the interrelationship between the Court’s treaty-based jurisdiction under such clauses and State complaint mechanisms, as provided for in human rights treaties, has not yet been fully considered and analysed. Moreover, there might also be interlinkages between the ICJ’s contentious jurisdiction under Article 36 (2) of the ICJ Statute and such State complaint procedures.