Соответствующая норма
Croatia
Practice Relating to Rule 47. Attacks against Persons Hors de Combat
Section B. Specific categories of persons hors de combat
Croatia’s LOAC Compendium (1991) and Soldiers’ Manual (1992) instruct soldiers to spare captured enemy combatants. 
Croatia, Compendium “Law of Armed Conflicts”, Republic of Croatia, Ministry of Defence, 1991, p. 46; Rules of Conduct for Soldiers, Republic of Croatia, Ministry of Defence, 1992, p. 4.
Croatia’s Commanders’ Manual (1992) states:
A combatant who is recognized (or should be recognized) as being out of combat (surrendering, wounded, shipwrecked in water …) may not be attacked. The intent to surrender can be shown with a white flag. 
Croatia, Basic Rules of the Law of Armed Conflicts – Commanders’ Manual, Republic of Croatia, Ministry of Defence, 1992, § 72.
Under Croatia’s Instructions on Basic Rules of IHL (1993), it is prohibited to kill or injure members of the enemy armed forces who have surrendered. 
Croatia, Instructions “Basic Rules of International Humanitarian Law Applicable in Armed Conflicts”, Republic of Croatia, Ministry of Defence, 1993, § 1.
Under Croatia’s Criminal Code (1997), whoever “kills or wounds an enemy who has laid down arms, or has surrendered at discretion, or has no longer any means of defence” commits a war crime. 
Croatia, Criminal Code, 1997, Article 161(1).