Соответствующая норма
Practice Relating to Rule 47. Attacks against Persons Hors de Combat
Section A. General
Serbia’s Criminal Code (2005) states that ordering or committing attacks against “persons incapacitated through combat”, in violation of international law, constitutes a war crime. 
Serbia, Criminal Code, 2005, Article 372(1).
The Criminal Code also states: “Whoever in violation of international law in time of war or armed conflict kills or wounds an enemy who has laid down his weapons or has surrendered unconditionally or has no means of defence, shall be punished by imprisonment of one to fifteen years.” 
Serbia, Criminal Code, 2005, Article 378(1).