This chapter argues that advisory proceedings have the procedural flexibility to enable individuals’ participation, despite the Court’s reluctance to bring such participation to fruition. It first dispels the myth that witnesses are limited to the confines of contentious proceedings. It then discusses the Court’s sparse engagement with amici curiae. Finally, it explores the potential of the analogous extension of Article 66(2) of the Court’s Statute, authorising the furnishing of information by entities beyond states and international organisations.