Соответствующая норма
Belgium
Practice Relating to Rule 161. International Cooperation in Criminal Proceedings
Section B. Extradition
Belgium’s Law of War Manual (1983) states:
The States Signatory to the [1949 Geneva] Conventions have engaged to take a series of measures in order to promote their respect. These measures can be summarized as follows:
3) search for, identification and prosecution before the own courts of the authors of grave breaches, whatever their nationality may be, or extradition of these authors to the State which requests for it, within the limits of the legislation in force. 
Belgium, Droit Pénal et Disciplinaire Militaire et Droit de la Guerre, Deuxième Partie, Droit de la Guerre, Ecole Royale Militaire, par J. Maes, Chargé de cours, Avocat-général près la Cour Militaire, D/1983/1187/029, 1983, p. 55, § 3(3).
Belgium’s Law on Cooperation with the International Criminal Court and the International Criminal Tribunals (2004), as amended, provides:
Within the limits set out in Article 108 of the Statute [of the International Criminal Court], Belgium may, pursuant to its legislation, extradite or surrender in any other way a convicted person serving his sentence to the State requesting his extradition or surrender, or to the international tribunal which requested his surrender for the purpose of trial or execution of sentence. 
Belgium, Law on Cooperation with the International Criminal Court and the International Criminal Tribunals, 2004, as amended in 2006, Article 36.