Соответствующая норма
Practice Relating to Rule 74. Chemical Weapons
Cameroon’s Instructor’s Manual (1992) states on the issue of chemical weapons: “The restrictions here are clear. It is prohibited to use such weapons against enemy combatants as well as against civilian populations.” It also calls for the “total destruction of the existing stockpile”. 
Cameroon, Droit international humanitaire et droit de la guerre, Manuel de l’instructeur en vigueur dans les Forces Armées, Présidence de la République, Ministère de la Défense, Etat-major des Armées, Troisième Division, Edition 1992, p. 124, § 441.
Cameroon’s Instructor’s Manual (2006) states:
Chemical weapons, according to the Paris Convention of 13 January 1993 on the Prohibition, Production, Stockpiling and Use of Certain Chemical Weapons and on Their Destruction [1993 Chemical Weapons Convention], are those … used or developed with the aim of killing through the toxic properties of chemicals.
This Convention imposes an absolute prohibition of chemical weapons both during international and internal armed conflicts. 
Cameroon, Droit des conflits armés et droit international humanitaire, Manuel de l’instructeur en vigueur dans les forces de défense, Ministère de la Défense, Présidence de la République, Etat-major des Armées, 2006, p. 272, § 631.
At the First Conference of States Parties to the Chemical Weapons Convention in 1997, Cameroon emphasized the importance of the 1993 Chemical Weapons Convention and stated its commitment to creating a world free of chemical weapons. 
Cameroon, Statement at the First Conference of States Parties to the Chemical Weapons Convention, The Hague, 6–23 May 1997.