3 This is due to a consolidation of the case law, but also to the substantive necessity of coherence and previsibility, notions which are particularly important in the realm of criminal law (nullum crimen sine lege, Bestimmtheitsgrundsatz). The way is now paved for the end of the experience of the two ad hoc Tribunals of 1993 and 1995. They have proved to be the icebreakers in the context of the birth of modern criminal international law.