Соответствующая норма
Practice Relating to Rule 88. Non-Discrimination
Section D. Persons deprived of their liberty
Serbia’s Law on Enforcement of Penal Sanctions (2005) states: “A prisoner shall not be discriminated [against] on grounds of race, colour, sex, language, religion, political or other convictions, ethnic or social origin, financial status, education, social or other personal status.” 
Serbia, Law on Enforcement of Penal Sanctions, 2005, Article 7.