he dissertation builds on the recognition that, due in major part to these systemic changes, the non-extradition of nationals increasingly comes under fire and that, as a consequence, several attempts were undertaken in recent years to disallow or at least considerably limit it. Focusing on two such endeavors (under the European Arrest Warrant and in the context of the International Criminal Court), Ms. Deen-Racsmány undertakes to identify the status and the role of the non-extradition of nationals and of its counterpart, the active personality principle, in international criminal law. Recognizing that the non-extradition of nationals cannot be easily discard, in theory or in practice, the study considers ways to adapt these long-standing phenomena of international cooperation in criminal matters to the requirements of international criminal justice.