Соответствующая норма
Italy
Practice Relating to Rule 161. International Cooperation in Criminal Proceedings
Section B. Extradition
Italy’s IHL Manual (1991) notes: “International cooperation for the search, arrest, extradition and punishment of persons who have committed [war crimes] is established.” 
Italy, Manuale di diritto umanitario, Introduzione e Volume I, Usi e convenzioni di Guerra, SMD-G-014, Stato Maggiore della Difesa, I Reparto, Ufficio Addestramento e Regolamenti, Rome, 1991, Vol. I, § 86.