Article 31 Neutral or other States not Parties to the conflict

Except by prior agreement, medical aircraft shall not fly over or land in the territory of a neutral or other State not a Party to the conflict. However, with such an agreement, they shall be respected throughout their flight and also for the duration of any calls in the territory.

Nevertheless they shall obey any summons to land or to alight on water, as appropriate.

Should a medical aircraft, in the absence of an agreement or in deviation from the terms of an agreement, fly over the territory of a neutral or other State not a Party to the conflict, either through navigational error or because of an emergency affecting the safety of the flight, it shall make every effort to give notice of the flight and to identify itself. As soon as such medical aircraft is recognized, that State shall make all reasonable efforts to give the order to land or to alight on water referred to in Article 30, paragraph 1, or to take other measures to safeguard its own interests, and, in either case, to allow the aircraft time for compliance, before resorting to an attack against the aircraft.

If a medical aircraft, either by agreement or in the circumstances mentioned in paragraph 2, lands or alights on water in the territory of a neutral or other State not Party to the conflict, whether ordered to do so or for other reasons, the aircraft shall be subject to inspection for the purposes of determining whether it is in fact a medical aircraft. The inspection shall be commenced without delay and shall be conducted expeditiously. The inspecting Party shall not require the wounded and sick of the Party operating the aircraft to be removed from it unless their removal is essential for the inspection. The inspecting Party shall in any event ensure that the condition of the wounded and sick is not adversely affected by the inspection or the removal. If the inspection discloses that the aircraft is in fact a medical aircraft, the aircraft with its occupants, other than those who must be detained in accordance with the rules of international law applicable in armed conflict, shall be allowed to resume its flight, and reasonable facilities shall be given for the continuation of the flight. If the inspection discloses that the aircraft is not a medical aircraft, it shall be seized and the occupants treated in accordance with paragraph 4.

The wounded, sick and shipwrecked disembarked, otherwise than temporarily, from a medical aircraft with the consent of the local authorities in the territory of a neutral or other State not a Party to the conflict shall, unless agreed otherwise between that State and the Parties to the conflict, be detained by that State where so required by the rules of international law applicable in armed conflict, in such a manner that they cannot again take part in the hostilities. The cost of hospital treatment and internment shall be borne by the State to which those persons belong.

Neutral or other States not Parties to the conflict shall apply any conditions and restrictions on the passage of medical aircraft over, or on the landing of medical aircraft in, their territory equally to all Parties to the conflict.