Соответствующая норма
Marshall Islands
Practice Relating to Rule 72. Poison and Poisoned Weapons
In its written statement submitted to the ICJ in the Nuclear Weapons case in 1995, the Marshall Islands stated that the “laws of war including the Geneva and Hague Conventions and the United Nations Charter … prohibit the use of poisonous substances”. 
Marshall Islands, Written statement submitted to the ICJ, Nuclear Weapons case, 22 June 1995, § 5.