Règle correspondante
Practice Relating to Rule 85. The Use of Incendiary Weapons against Combatants
Section B. The use of incendiary weapons against combatants in particular
Sweden’s IHL Manual (1991) states:
[The 1980] Protocol III [to the Convention on Certain Conventional Weapons] contains restrictions applying where incendiary weapons are used.
At the same time it must be noted that it has not been possible to reach agreement on a rule that would also afford combatants protection against these weapons.
There is a need to supplement the present Protocol III so that the agreement constitutes a complete prohibition of incendiary weapons. In this way, protection of civilians could be further enhanced, and this should be extended to cover combatants. For, in fact, the latter also experience injury from incendiary weapons as unnecessary suffering. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.3.2, pp. 81–83.
[emphasis in original]