Related Rule
Russian Federation
Practice Relating to Rule 88. Non-Discrimination
Section D. Persons deprived of their liberty
The Russian Federation’s Regulations on the Application of IHL (2001) states:
Under any circumstances international humanitarian law ensures humane treatment during an armed conflict of persons not directly involved in combat operations, including those who have been rendered hors de combat by … detention … without adverse distinction for reasons of race, colour, faith, birth, wealth or any other similar criteria. 
Russian Federation, Regulations on the Application of International Humanitarian Law by the Armed Forces of the Russian Federation, Ministry of Defence of the Russian Federation, Moscow, 8 August 2001, § 4.