Соответствующая норма
France
Practice Relating to Rule 4. Definition of Armed Forces
Section B. Incorporation of paramilitary or armed law enforcement agencies into armed forces
Upon ratification of the 1977 Additional Protocol I, France informed the States party to the 1977 Additional Protocol I that its armed forces permanently include the Gendarmerie. 
France, Reservations and declarations made upon ratification of the 1977 Additional Protocol I, 11 April 2001, § 7.