- Contents : The establishment of the system of international criminal justice / Roberto Bellelli -- The International Criminal Tribunal for the Former Yugoslavia / Fausto Pocar -- The International Criminal Tribunal for Rwanda / Erik Møse -- The Special Court for Sierra Leone / Renate Winter -- Reflections based on the ICTY's experience / Carla del Ponte -- Challenges related to investigation and prosecution at the International Criminal Court / Fatou Bensouda -- The early experience of the Extraordinary Chambers in the Courts of Cambodia / Chea Leang and William Smith -- The history and the evolution of the notion of international crimes / Paola Gaeta -- Concurrent jurisdictions between primacy and complementarity / Flavia Lattanzi -- Obligation to cooperate and duty to implement / Roberto Bellelli -- Addressing the impunity gap through cooperation / Nicola Piacente -- Genocide case law at the ICTY / Susanne Malmstro¨m -- Crimes against humanity in the former Yugoslavia / B. Don Taylor III -- War crimes at the ICTY : jurisdictional and substantive issues / Guido Acquaviva -- Gender-based violence offences and crimes against children at the SCSL / Renate Winter and Stephen Kostas -- The War Crimes Chamber in the Court of Bosnia and Herzegovina / Melika Murtezic -- The object of review mechanisms : statutes' provisions, elements of crimes and rules of procedure and evidence / Otto Triffterer -- Universality : momentum and consensus for the ICC / Ju¨rg Lindenmann -- The law of the Statute and its practice under review / Roberto Bellelli -- Appearance of witnesses and unavailability of subpoena powers for the court / Go¨ran Sluiter -- Implementing international humanitarian law through the Rome Statute / Anne-Marie la Rosa and Gabriel Chavez Tafur -- The 'weapons provisions' and its annex : the Belgian proposals / Roger S. Clark -- State responsibility for acts of aggression under the United Nations Charter : a review of cases / Edoardo Greppi -- Individual responsibility for the crime of aggression / Muhammad Aziz Shukri -- National legislation on individual responsibility for conduct amounting to aggression / Astrid Reisinger Coracini -- The crime of aggression before the first review of the ICC statue / Claus Kreß -- The crime of aggression and complementarity / Pa°l Wrange -- A pragmatic approach to the crime of aggrssion / David Scheffer -- Against the odds : the results of the Special Working Group on the Crime of Aggression / Stefan Barriga.