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
VI APPREHENSION AND SURRENDER
Article 37
A valid court decision granting the surrender of the person indicted to the International Criminal Court is final. It may be appealed against by means of a constitutional complaint lodged with the Constitutional Court of the Republic of Croatia. The Minister of Justice may temporarily postpone the surrender of the person indicted on account of this person's illness or for other particularly justified reason.
Appeal against other decisions - national proceedings
EDIT.