Prof. Jure Vidmar is Chair of Public International Law at Maastricht University (The Netherlands). Prior to coming to Maastricht, he held teaching and research positions at the University of Oxford, Harvard Law School, University of Amsterdam and University of Nottingham. He is also affiliated with the Faculty of Law, University of Pretoria. Jure has published widely in several areas of international law. His books include Democratic Statehood in International Law: The Emergence of New States in Post-Cold War Practice, Oxford, Hart, 2013, Runner-up for the Birks Prize for Outstanding Legal Scholarship in 2014) and Hierarchy in International Law: The Place of Human Rights (Oxford, OUP, 2012, with Erika de Wet). Prof. Ruth Kok is Associate Professor of Criminal Law and Criminal Procedure at the Faculty of Law of the University of Aruba. She was a Senior Legal Advisor at the Legal and Operational Affairs Department of the Ministry of Security and Justice of The Netherlands. Until 2014 she was a Member of the Legal Research Office (Section Criminal Law) of the Supreme Court of The Netherlands and served as a Substitute Judge at the district court. In 2007 she received her PhD from Amsterdam University for her doctoral thesis on Statutory Limitations in International Criminal Law. She obtained her Law degree from Leiden University (The Netherlands). Her main expertise is (international) criminal law.