Related Rule
Togo
Practice Relating to Rule 17. Choice of Means and Methods of Warfare
Togo’s Military Manual (1996) states: “Precautions must be taken in the choice of weapons and methods of combat in order to avoid civilian losses and damage to civilian objects.” 
Togo, Le Droit de la Guerre, III fascicules, Etat-major Général des Forces Armées Togolaises, Ministère de la Défense nationale, 1996, Fascicule III, p. 11.
The manual specifies that: “The direction and the moment of an attack must be chosen so as to reduce civilian losses and damage to civilian objects as much as possible.” 
Togo, Le Droit de la Guerre, III fascicules, Etat-major Général des Forces Armées Togolaises, Ministère de la Défense nationale, 1996, Fascicule III, p. 14.