Related Rule
Practice Relating to Rule 17. Choice of Means and Methods of Warfare
The Report on the Practice of Japan refers to a statement made by Japan at the CDDH to the effect that “those who planned an attack by incendiary weapons were required to weigh carefully beforehand whether some other means of attack could be used in order to minimize civilian casualties”. 
Report on the Practice of Japan, 1998, Chapter 1.6, referring to Statement by Japan at the CDDH, Official Records, Vol. XVI, CDDH/IV/SR.27, 19 May 1976, p. 279, § 24.