Related Rule
Russian Federation
Practice Relating to Rule 37. Open Towns and Non-Defended Localities
Section C. Attacks on open towns and non-defended localities
The Russian Federation’s Military Manual (1990) states that “the bombardment by military aircraft or vessels of cities, ports, villages, dwellings or buildings … which are undefended and not used for military purposes” is a prohibited method of warfare. 
Russian Federation, Instructions on the Application of the Rules of International Humanitarian Law by the Armed Forces of the USSR, Appendix to Order of the USSR Defence Minister No. 75, 1990, § 5(n).
The Russian Federation’s Regulations on the Application of IHL (2001) states: “objects protected by international humanitarian law include … non-defended … zones … Attacks against such objects are prohibited by international humanitarian law with the exception of cases stipulated by this law.” 
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.