Соответствующая норма
Practice Relating to Rule 146. Reprisals against Protected Persons
Section B. Wounded, sick and shipwrecked in the power of the adversary
Belgium’s Law of War Manual (1983), citing several examples of jurisprudence, states:
The persons protected by the Geneva Conventions (wounded and sick, shipwrecked …) … may not be made the object of reprisals. Therefore, [reprisals] may be directed only against combatants, non-protected property and a restricted group of non-protected civilians. 
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. 36.