Related Rule
Benin
Practice Relating to Rule 47. Attacks against Persons Hors de Combat
Section B. Specific categories of persons hors de combat
Benin’s Military Manual (1995) states: “It is prohibited to kill or injure an adversary who surrenders.” 
Benin, Le Droit de la Guerre, III fascicules, Forces Armées du Bénin, Ministère de la Défense nationale, 1995, Fascicule II, p. 4; see also Fascicule I, p. 16 and Fascicule II, p. 18.
The manual also provides: “Any person recognized, or who should be recognized, as not being able to participate any longer in combat shall not be attacked (for example: in case of surrender, wounds, … shipwreck …).” It specifies that an intention to surrender must be clearly expressed and gives a few examples, such as raising hands, laying down arms and waving a white flag. 
Benin, Le Droit de la Guerre, III fascicules, Forces Armées du Bénin, Ministère de la Défense nationale, 1995, Fascicule II, p. 9.