Соответствующая норма
Canada
Practice Relating to Rule 85. The Use of Incendiary Weapons against Combatants
Section B. The use of incendiary weapons against combatants in particular
Canada’s LOAC Manual (1999) states: “The use of incendiary weapons against combatants is not prohibited unless such use results in superfluous injury or unnecessary suffering.” 
Canada, The Law of Armed Conflict at the Operational and Tactical Level, Office of the Judge Advocate General, 1999, p. 5-4, § 35.
Canada’s LOAC Manual (2001) states in its chapter entitled “Restrictions on the use of weapons”: “The use of incendiary weapons against combatants is not prohibited unless such use results in superfluous injury or unnecessary suffering.” 
Canada, The Law of Armed Conflict at the Operational and Tactical Levels, Office of the Judge Advocate General, 13 August 2001, § 521.3.