Related Rule
Ukraine
Practice Relating to Rule 84. The Protection of Civilians and Civilian Objects from the Effects of Incendiary Weapons
Ukraine’s IHL Manual (2004) states that the following means of warfare is prohibited:
- incendiary weapons directed against the civilian population or civilian objects as well as forests or other kinds of plant cover unless the use of such weapons is covered by cases indicated in the Primary Requirements of Protocol III [to the 1980 Convention on Certain Conventional Weapons]. 
Ukraine, Manual on the Application of IHL Rules, Ministry of Defence, 11 September 2004, § 1.3.3.
The manual further states: “If combat is conducted in the forest, it is necessary to take into account the probability of forest fires that are likely to endanger persons and objects protected by international humanitarian law.” 
Ukraine, Manual on the Application of IHL Rules, Ministry of Defence, 11 September 2004, § 2.3.5.4.