Related Rule
Russian Federation
Practice Relating to Rule 65. Perfidy
Section J. Simulation of protected status by using flags or military emblems, insignia or uniforms of neutral or other States not party to the conflict
The Russian Federation’s Regulations on the Application of IHL (2001) states:
When planning and conducting combat operations it is necessary to draw a clear distinction between perfidy and ruses of war. Perfidy means committing a hostile act under the cover of a right to protection by feigning: … a protected status by the use of emblems, signs and signals, or uniforms … of neutral or other states not parties to the armed conflict. 
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, § 8.