Artikel 27

1. The medical aircraft of a Party to the conflict shall continue to be protected while flying over land or sea areas physically controlled by an adverse Party, provided that prior agreement to such flights has been obtained from the competent authority of that adverse Party.
2. A medical aircraft which flies over an area physically controlled by an adverse Party without, or in deviation from the terms of, an agreement provided for in paragraph 1, either through navigational error or because of an emergency affecting the safety of the flight, shall make every effort to identify itself and to inform the adverse Party of the circumstances. As soon as such medical aircraft has been recognized by the adverse Party, that Party 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.