Related Rule
Russian Federation
Practice Relating to Rule 12. Definition of Indiscriminate Attacks
Section B. Attacks which cannot be directed at a specific military objective
The Russian Federation’s Regulations on the Application of IHL (2001) states: “Indiscriminate attacks are … those which employ a method or means of combat which can not be directed at a specific military objective.” 
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, § 54.