Related Rule
Russian Federation
Practice Relating to Rule 30. Persons and Objects Displaying the Distinctive Emblem
The Russian Federation’s Regulations on the Application of IHL (2001) states: “The prohibited methods of warfare include … attacking medical units [and] medical transports marked with proper distinctive emblems (signs) and using appropriate signals.” 
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, § 7.
With regard to internal armed conflict, the Regulations states:
[T]he distinctive emblem (a red cross on a white ground) shall be carried and displayed in clearly visible places by the medical and religious personnel, medical units and medical transports. It shall be respected in all circumstances. 
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, § 83.