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
(3) All government bodies of the Republic of Croatia shall act in good faith in the process of cooperation, guided by the goals from the Statute and the purpose of each individual activity carried out.
(4) The competent government bodies shall also undertake the activities which the International Criminal Court has not expressly requested, if it appears that they are necessary in order to find the perpetrator and collect evidence for a trial before the International Criminal Court.
Unique provision - cooperation
EDIT.