Соответствующая норма
Practice Relating to Rule 157. Jurisdiction over War Crimes
Slovenia’s Penal Code (1994) criminalizes genocide and war crimes broadly defined and applies to Slovenian nationals who have committed offences abroad; to non-nationals who have committed offences against Slovenian nationals abroad: and to non-nationals who have committed a criminal offence against a third country or any of its citizens abroad. 
Slovenia, Penal Code, 1994, Articles 122 and 123.