The judgment of the International Court of Justice (ICJ) of 11 November 2013, interpreting its 1962 judgment in the case concerning the Temple of Preah Vihear, inspires a reconsideration of the role of interpretation proceedings pursuant to Article 60 of the Statute of the Court. In particular, it invites us to take a closer look at the role and scope of the principle of res judicata in public international law in general and as considered in the case law of the Court in particular. This contribution reveals the competing concepts of the principle in interpretation and consecutive original contentious proceedings, and promotes instead a uniform concept that avoids the conflict inherent in current approaches.

Section 1 introduces Article 60 of the ICJ Statute (section 1.1.) and thereinafter views interpretation proceedings before the Court in light of the Court's case law, in particular its 2013 interpretation judgment in the Temple case (section 1.2.). Section 2 constitutes the heart of the analysis and discusses what will be identified as the competing concepts of res judicata. Section 2.1. presents the functions, concepts, and case law of res judicata in public international law in general, whereas section 2.2. focuses specifically on the case law of the ICJ and the Permanent Court of International Justice (PCIJ) in this regard. Finally, section 2.3. concludes this study by setting out the approach that the author regards as appropriate to reconcile the competing concepts of res judicata.