Related Rule
Belgium
Practice Relating to Rule 87. Humane Treatment
Belgium’s Law of War Manual (1983) states, with reference to common Article 3 of the 1949 Geneva Conventions, that in internal armed conflicts, “persons who do not take a direct part in hostilities, including members of the armed forces who have laid down their arms and persons placed hors de combat, must be treated humanely”. 
Belgium, Droit Pénal et Disciplinaire Militaire et Droit de la Guerre, Deuxième Partie, Droit de la Guerre, Ecole Royale Militaire, par J. Maes, Chargé de cours, Avocat-général près la Cour Militaire, D/1983/1187/029, 1983, p. 17 and Chapter IX, § 2.
Belgium’s Law of War Manual (1983) states that, in internal armed conflicts, the following must be respected: “humanitarian treatment of persons who do not take a direct part in hostilities, including members of the armed forces who have laid down their arms and persons placed hors de combat”. It also provides: “The population in occupied territory must be treated with humanity.” 
Belgium, Droit Pénal et Disciplinaire Militaire et Droit de la Guerre, Deuxième Partie, Droit de la Guerre, Ecole Royale Militaire, par J. Maes, Chargé de cours, Avocat-général près la Cour Militaire, D/1983/1187/029, 1983, p. 17 and Chapter IX, § 2.
Belgium’s Law of War Manual (1983) provides:
POWs [prisoners of war] shall be treated at all times with humanity. Any unlawful act or omission by the Detaining Power causing death or seriously endangering the health of a prisoner of war in its custody is prohibited and will be regarded as a serious breach of the [1949 Geneva Convention III]. POWs shall at all times be protected, particularly against acts of violence or intimidation and against insults and public curiosity. 
Belgium, Droit Pénal et Disciplinaire Militaire et Droit de la Guerre, Deuxième Partie, Droit de la Guerre, Ecole Royale Militaire, par J. Maes, Chargé de cours, Avocat-général près la Cour Militaire, D/1983/1187/029, 1983, p. 44.
Belgium’s Teaching Manual for Soldiers provides: “Prisoners of war must be treated humanely and protected.” 
Belgium, Droit de la Guerre, Dossier d’Instruction pour Soldat, à l’attention des officiers instructeurs, JS3, Etat-Major Général, Forces Armées belges, undated, p. 10.