Related Rule
France
Practice Relating to Rule 47. Attacks against Persons Hors de Combat
Section A. General
France’s LOAC Summary Note (1992) states: “It is prohibited to kill or injure an adversary who … is hors de combat.” 
France, Fiche de Synthèse sur les Règles Applicables dans les Conflits Armés, Note No. 432/DEF/EMA/OL.2/NP, Général de Corps d’Armée Voinot (pour l’Amiral Lanxade, Chef d’Etat-major des Armées), 1992, § 2.1.
France’s LOAC Teaching Note (2000) provides: “It is prohibited to attack … an adversary … who is hors de combat.” 
France, Fiche didactique relative au droit des conflits armés, Directive of the Ministry of Defence, 4 January 2000, annexed to the Directive No. 147 of the Ministry of Defence of 4 January 2000, p. 2.
France’s LOAC Manual (2001) states: “A person who is recognized or who, in the circumstances, should be recognized to be hors de combat shall not be made the object of attack.” 
France, Manuel de droit des conflits armés, Ministère de la Défense, Direction des Affaires Juridiques, Sous-Direction du droit international humanitaire et du droit européen, Bureau du droit des conflits armés, 2001, pp. 104 and 105.
France’s Penal Code (1992), as amended in 2010, states in its section on war crimes common to both international and non-international armed conflicts:
Causing serious injury to the physical integrity of a combatant from the adverse party who, having laid down his arms or having no longer means of defence, has surrendered, is punishable by 20 years’ imprisonment. 
France, Penal Code, 1992, as amended in 2010, Article 461-10.