Règle correspondante
Practice Relating to Rule 14. Proportionality in Attack
Kenya’s LOAC Manual (1997) states that one of the main principles which places constraints on the conduct of hostilities is “the principle of proportionality which calls for the avoidance of unnecessary suffering and damage and therefore prohibits all forms of violence not indispensable for the overpowering of the enemy”. 
Kenya, Law of Armed Conflict, Military Basic Course (ORS), 4 Précis, The School of Military Police, 1997, Précis No. 4, p. 1; see also Précis No. 4, p. 9.