Related Rule
Russian Federation
Practice Relating to Rule 72. Poison and Poisoned Weapons
The Russian Federation’s Military Manual (1990) prohibits “poison and poisoned weapons”. 
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, Article 6(d).
The Russian Federation’s Regulations on the Application of IHL (2001) states: “The following shall be prohibited to use in the course of combat operations: … poison or poisoned weapons.” 
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, § 9.