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
VIII. PARTICIPATION OF THE REPUBLIC OF CROATIA IN THE WORK OF THE INTERNATIONAL CRIMINAL COURT
Article 45
(1) The provisions hereof related to uncovering and prosecuting crimes in the Republic of Croatia and to the organisation of government bodies (Articles 7-16 hereof) shall be applied as of the date of the entry of this Law into force, irrespectively of when the crime was committed and whether the criminal proceedings before a competent court have been instituted.
(2) If upon the entry of this Law into force the investigation is already under way, it shall be completed pursuant to the provisions of the Law on Criminal Procedure.
(3) If upon the entry of this Law into force the main hearing has not begun yet, or if a senior court acting on a remedy has repealed the decision issued in the first instance and has returned the case for re-trial, the main hearing and further proceedings shall be conducted pursuant to the provisions hereof before the courts competent and staffed pursuant to this Law.
Entry into force
Non-retroactivity
Nullum crimen sine lege
EDIT.