Related Rule
Belgium
Practice Relating to Rule 121. Location of Internment and Detention Centres
Belgium’s Law of War Manual (1983) provides that prisoners of war shall be evacuated as soon as possible to camps located away from the combat zone so as to be out of danger. 
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. 45.
Belgium’s Teaching Manual for Soldiers provides: “To the extent possible, POWs [prisoners of war] must be kept away from combat zones and from possible violence by the hostile population.” 
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. 20.