Соответствующая норма
Practice Relating to Rule 72. Poison and Poisoned Weapons
In its written statement submitted to the ICJ in the Nuclear Weapons case in 1995, Egypt, referring to Article 22 of the 1907 Hague Regulations, noted the “prohibition against the use of weapons which render death inevitable or cause unnecessary suffering” and, in this context, stated: “As far as weapons are concerned, since the nineteenth century this humanitarian principle has been embodied in two rules: one forbids the use of poisons.” 
Egypt, Written statement submitted to the ICJ, Nuclear Weapons case, 20 June 1995, pp.12–13, § 19.