Related Rule
Belgium
Practice Relating to Rule 79. Weapons Primarily Injuring by Non-Detectable Fragments
Belgium’s Law of War Manual (1983) states: “The use of any weapon the primary effect of which is to injure by fragments which in the human body escape detection by X-ray is prohibited.” 
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. 39.