Related Rule
Russian Federation
Practice Relating to Rule 8. Definition of Military Objectives
Section C. Places where armed forces or their materiel are located
The Russian Federation’s Regulations on the Application of IHL (2001) states: “military objectives include … objects (structures, buildings) used (ready to be used) for military purposes”. 
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.