Related Rule
Russian Federation
Practice relating to Rule 66. Non-Hostile Contacts between the Parties to the Conflict
Section C. Definition of parlementaires
The Russian Federation’s Regulations on the Application of IHL (2001) states:
[P]arlementaires are persons authorized by their command to enter into communication with the enemy command and coming with a white flag. The parlementaire as well as persons who may accompany him (the trumpeter, bugler or drummer, the flag-bearer and the interpreter) have a right to inviolability. 
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, § 1; see also §§ 7 (prohibited methods of warfare) and 67 (armistice and termination of combat operations).