相关规则
Burundi
Practice Relating to Rule 72. Poison and Poisoned Weapons
Burundi’s Regulations on International Humanitarian Law (2007) states: “It is prohibited to use poison or poisonous weapons because these weapons inevitably lead to death, or may cause superfluous injuries which generally lead to death.” 
Burundi, Règlement n° 98 sur le droit international humanitaire, Ministère de la Défense Nationale et des Anciens Combattants, Projet “Moralisation” (BDI/B-05), August 2007, Part I, p. 15; see also Part I bis, pp. 10, 27, 33 and 53.
Burundi’s Law on Genocide, Crimes against Humanity and War Crimes (2003) states:
[The following are] considered as war crimes:
B. Other serious violations of the laws and customs applicable in international armed conflicts, within the established framework of international law, namely, any of the following acts:
q) using poison or poisoned weapons … and all analogous liquids, materials or weaponry. 
Burundi, Law on Genocide, Crimes against Humanity and War Crimes, 2003, Article 4(B)(q).
Burundi’s Penal Code (2009) states:
“War crimes” means crimes which are committed as part of a plan or policy or as part of a large-scale commission of such crimes, in particular:
2. … [S]erious violations of the laws and customs applicable in international armed conflict, within the established framework of international law, namely, any of the following acts:
17°. Employing poison or poisoned weapons. 
Burundi, Penal Code, 2009, Article 198(2)(17°).