Related Rule
Practice Relating to Rule 85. The Use of Incendiary Weapons against Combatants
Section B. The use of incendiary weapons against combatants in particular
Australia’s Commanders’ Guide (1994) states, with reference to the 1980 Protocol III to the Convention on Certain Conventional Weapons: “There are no prohibitions on the use of incendiary weapons against combatants.” 
Australia, Law of Armed Conflict, Commanders’ Guide, Australian Defence Force Publication, Operations Series, ADFP 37 Supplement 1 – Interim Edition, 7 March 1994, § 935.