Соответствующая норма
Practice Relating to Rule 47. Attacks against Persons Hors de Combat
Section B. Specific categories of persons hors de combat
Under Slovenia’s Penal Code (1994), whoever “kills or wounds an enemy who has laid down arms or surrendered unconditionally or who is defenceless” commits a war crime. 
Slovenia, Penal Code, 1994, Article 379(1).