Related Rule
Practice Relating to Rule 15. The Principle of Precautions in Attack
Section B. Avoidance or minimization of incidental damage
Benin’s Military Manual (1995) states: “Precautions must be taken when planning military operations in order to avoid civilian losses and damage to civilian objects or to minimize such losses and damage when they are unavoidable.” 
Benin, Le Droit de la Guerre, III fascicules, Forces Armées du Bénin, Ministère de la Défense nationale, 1995, Fascicule III, p. 8; see also Fascicule II, p. 6.