Related Rule
Practice Relating to Rule 47. Attacks against Persons Hors de Combat
Section C. Quarter under unusual circumstances of combat
France’s LOAC Manual (2001) states: “When the capturing unit is not able to evacuate its prisoners or to keep them until the evacuation is possible, the unit must free them while guaranteeing its own and the prisoners’ security.” 
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, p. 102.
Upon ratification of the 1977 Additional Protocol I, France stated that it considered that the term “feasible” as used in the Protocol meant “that which can be realized or which is possible in practice, taking into account all circumstances ruling at the time, including humanitarian and military considerations”. 
France, Reservations and declarations made upon ratification of the 1977 Additional Protocol I, 11 April 2001, § 3.