Related Rule
France
Practice Relating to Rule 79. Weapons Primarily Injuring by Non-Detectable Fragments
France’s LOAC Teaching Note (2000) includes weapons that injure by non-detectable fragments in the list of weapons that “are totally prohibited by the law of armed conflict” because of their inhuman and indiscriminate character. 
France, Fiche didactique relative au droit des conflits armés, Directive of the Ministry of Defence, 4 January 2000, annexed to the Directive No. 147 of the Ministry of Defence of 4 January 2000, p. 6.
France’s LOAC Manual (2001) includes weapons that injure by non-detectable fragments in the list of weapons that “are totally prohibited by the law of armed conflict” because of their inhuman and indiscriminate character. 
France, Manuel de droit des conflits armés, Ministère de la Défense, Direction des Affaires Juridiques, Sous-Direction du droit international humanitaire et du droit européen, Bureau du droit des conflits armés, 2001, pp. 53-54.
Upon ratification of the 1980 Convention on Certain Conventional Weapons, France stated:
with reference to the scope of application defined in article 1 of the Convention on Prohibitions or Restrictions on the Use of Certain Conventional Weapons, … it will apply the provisions of the Convention and its three Protocols [I, II and III] to all armed conflicts referred to in articles 2 and 3 common to the Geneva Conventions of 12 August 1949 [international and non-international armed conflicts]. 
France, Reservations made upon ratification of the Convention on Certain Conventional Weapons, 4 March 1988.