Extradition has always been a mainstay in the area of international cooperation in criminal matters between states. Presently, the "new" basic instruments of the Council of Europe on the international validity of criminal judgments and on the transfer of proceedings in criminal matters do not threaten the longstanding principles of extradition. Even if these instruments were ratified on a large scale, these instruments could never be a complete substitute for extradition as Europe knows it.
G. Vermeulen & T. Vander Beken, New Conventions on Extradition in the European Union: Analysis and Evaluation, 15 Penn St. Int'l L. Rev. 265 (1997).