VI. ARREST, DETENTION AND SURRENDER OF A PERSON TO THE INTERNATIONAL CRIMINAL COURT
Article 10
(6) In a case in which the competent national bodies do not receive a request for surrender and the appurtenant documentation in the time limit determined by the Rules of Procedure and Evidence, the person who has been provisionally arrested shall be released, unless the person himself agrees to surrender prior to the time limit expiring. The release of a person in such a case shall not prevent his later arrest and surrender in compliance with a request and appurtenant documentation sent later.
Provisional arrest - consent to surrender
EDIT.