Соответствующая норма
Belgium
Practice Relating to Rule 145. Reprisals
Section D. Order at the highest authority of government
Belgium’s Law of War Manual (1983) states: “Although no precise rules exist on the subject, reprisals may only be ordered by the government or commanders-in-chief, because of the importance of the political and/or military consequences they may entail.” 
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. 35.