Part 4 Mutual Assistance through the Execution of Decisions and Orders of the Court
ยง 42 Escape and Speciality
(relating to Article 108, Article 111 of the Rome Statute)
(3) If a foreign state requests extradition, provisional extradition, deportation, or other transfer to its sovereign territory for criminal prosecution or execution of a sentence or other sanction, approval may be given when the Court, subject to the provisions of Article 108 para. 3 of the Rome Statute, has given prior approval and the extradition is permissible according to the extradition regulations applicable to the requesting state.
Extradition
Transfer of sentenced person to another State
EDIT.