Соответствующая норма
Practice Relating to Rule 6. Civilians’ Loss of Protection from Attack
Section C. Situations of doubt as to the character of a person
Croatia’s LOAC Compendium (1991) states that, in case of doubt, persons have to be considered as civilians. 
Croatia, Compendium Law of Armed Conflicts, Republic of Croatia, Ministry of Defence, 1991, p. 6.
On the basis of Croatia’s Constitution (1990) and Defence Law (1993), the Report on the Practice of Croatia states that Article 50 of the 1977 Additional Protocol I is directly applicable in Croatia’s internal legal order. 
Report on the Practice of Croatia, 1998, Answers to additional questions on Chapter 1, referring to Constitution, 1990, Article 134 and Defence Law, 1993, Article 39.