Chapter III Crimes Against International Humanitarian Law, Genocide and Other Crimes Against Humanity
Section 4. War Crimes. - For the purpose of this Act, "war crimes" or "crimes against Interntional Human Humanitarian Law" means:
(c) Other serious violations of the laws and customs applicable in armed conflict, within the established framework of international law, namely:
(25) Employing means of warfare which are prohibited under international law, such as:
(ii) Asphyxiating, poisonous or other gases, and all analogous liquids, materials or devices;
EDIT.