Соответствующая норма
Croatia
Practice Relating to Rule 10. Civilian Objects’ Loss of Protection from Attack
Section A. Civilian objects used for military purposes
Croatia’s Commanders’ Manual (1992) states: “Civilian objects must not be attacked unless they have become military objectives.” 
Croatia, Basic Rules of the Law of Armed Conflicts – Commanders’ Manual, Republic of Croatia, Ministry of Defence, 1992, § 11.