The admissibility challenge of the defence in Katanga has raised complex issues of litigation in the light of the practice of self-referrals and existing ICC jurisprudence. This article examines the Katanga Trial Chamber decision and its consequences from this perspective. It focuses on three themes that are of particular relevance, since they have a direct impact on the functioning of the Court and its different organs: (i) the timing for a challenge of the admissibility of the case; (2) access to information related to admissibility; and (iii) the role of the defence.