Related Rule
France
Practice Relating to Rule 29. Medical Transports
France’s Disciplinary Regulations (1975), as amended, provides that soldiers in combat must respect and protect medical transports. 
France, Règlement de Discipline Générale dans les Armées, Decree No. 75-675 of 28 July 1975, replacing Decree No. 66-749, completed by Decree of 11 October 1978, implemented by Instruction No. 52000/DEF/C/5 of 10 December 1979, and modified by Decree of 12 July 1982, Ministère de la Défense, Etat-Major de l’Armée de Terre, Bureau Emploi, Article 9 bis (1).
France’s LOAC Summary Note (1992) states: “Medical transports must not be used to collect military information.” 
France, Fiche de Synthèse sur les Règles Applicables dans les Conflits Armés, Note No. 432/DEF/EMA/OL.2/NP, Général de Corps d’Armée Voinot (pour l’Amiral Lanxade, Chef d’Etat-major des Armées), 1992, § 2.3.
France’s LOAC Manual (2001), with reference to Article 12 of the 1977 Additional Protocol I, includes medical means of transportation among objects which are specifically protected by the law of armed conflict. 
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. 30.
France’s Penal Code (1992), as amended in 2010, states in its section on war crimes common to both international and non-international armed conflicts:
Intentionally launching attacks against … medical transports displaying, in conformity with international law, the distinctive emblems provided for in the [1949 Geneva Conventions] or their [1977] Additional Protocols is punishable by 20 years’ imprisonment. 
France, Penal Code, 1992, as amended in 2010, Article 461-12.
Under the instructions given to the French armed forces for the conduct of Opération Mistral, simulating a military operation under the right of self-defence or a mandate of the UN Security Council, medical transports and material shall be protected. 
France, État-major de la Force d’Action Rapide, Ordres pour l’Opération Mistral, 1995, Section 6, § 62.
France’s LOAC Summary Note (1992) states: “Medical transports must not be used to collect military information.” 
France, Fiche de Synthèse sur les Règles Applicables dans les Conflits Armés, Note No. 432/DEF/EMA/OL.2/NP, Général de Corps d’Armée Voinot (pour l’Amiral Lanxade, Chef d’Etat-major des Armées), 1992, § 2.3.
The instructions given to the French armed forces for the conduct of Opération Mistral, simulating a military operation under the right of self-defence or a mandate of the UN Security Council, refer to Articles 25 and 27 of the 1977 Additional Protocol I. 
France, Etat-major de la Force d’Action Rapide, Ordres pour l’Opération Mistral, 1995, Section 6, § 62.
Upon ratification of the 1977 Additional Protocol I, France stated:
Given the practical need to use non-dedicated aircraft for medical evacuation missions, the Government of the Republic of France does not interpret paragraph 2 of Article 28 as precluding the presence on board of communication equipment and encryption material or the use thereof solely to facilitate navigation, identification or communication in support of a medical transportation mission as defined in Article 8. 
France, Reservations and declarations made upon ratification of the 1977 Additional Protocol I, 11 April 2001, § 5.
France’s LOAC Manual (2001) provides:
Convention II adopted in Geneva on 12 August 1949 protects hospital ships against armed attacks and capture. Considered as a hospital ship is a ship built or equipped specially and solely with a view to assisting the wounded. It must be the object of special marking, i.e. be painted white and covered with a red cross, so that its identification is possible. A hospital ship must not be equipped with weapons: it can, however, possess portable arms for self-defence. Ships chartered by a party to the conflict for the transport of medical equipment and lifeboats benefit from the same protections.
Furthermore, the warships of parties to a conflict can carry out support missions in the health domain; these ships are not considered as hospital ships. 
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. 57.