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Croatia
Practice Relating to Rule 10. Civilian Objects’ Loss of Protection from Attack
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.
Croatia’s LOAC Compendium (1991) affirms that in case of doubt as to whether an object is military or civilian in character, it should be considered as a civilian object. 
Croatia, Compendium “Law of Armed Conflicts”, Republic of Croatia, Ministry of Defence, 1991, p. 7.