LAW on the Implementation of the Statute of the International Criminal Court and the Prosecution of Crimes against International Law of War and Humanitarian Law
V COOPERATION WITH INTERNATIONAL CRIMINAL COURT
Article 23
(2) The cooperation request by the International Criminal Court shall be confidential and its content may be disclosed when this is necessary for its fulfilment, or for other particularly important reasons.
Confidentiality re request for cooperation and supporting documentation
EDIT.