Treaty of Sèvres/Part X
The aircraft of the Allied Powers shall have full liberty of passage and landing over and in the territory and territorial waters of Turkey, and shall enjoy the same privileges as Turkish aircraft, particularly in case of distress by land or sea.
The aircraft of the Allied Powers shall, while in transit to any foreign country whatever, enjoy the right of flying over the territory and territorial waters of Turkey without landing, subject always to any regulations which may be made by Turkey with the assent of the Principal Allied Powers, and which shall be applicable equally to the aircraft of Turkey and to those of the Allied countries.
All aerodromes in Turkey open to national public traffic shall be open for the aircraft of the Allied Powers, and in any such aerodrome such aircraft shall be treated on a footing of equality with Turkish aircraft as regards charges of every description, including charges for landing and accommodation.
In addition to the above-mentioned aerodromes, Turkey undertakes to establish aerodromes in such localities as may be designated by the Allied Powers within one year from the coming into force of the present Treaty. The provisions of this Article will apply to such aerodromes.
The Allied Powers reserve the right, in the event of the provisions of this Article not being carried out, to take all necessary measures to permit of international aerial navigation over the territory and territorial waters of Turkey.
Subject to the present provisions, the rights of passage, transit and landing provided for in Articles 318, 319 and 320 are subject to the observance of such regulations as Turkey may consider it necessary to enact, but such regulations must be approved by the Principal Allied Powers and shall be applied without distinction to Turkish aircraft and to those of the Allied countries.
Certificates of nationality, air-worthiness or competency and licences, issued or recognised as valid by any of the Allied Powers, shall be recognised in Turkey as valid and as equivalent to the certificates and licences issued by Turkey.
As regards internal commercial air traffic the aircraft of the Allied Powers shall enjoy in Turkey most-favoured-nation treatment.
The benefit of the provisions of Articles 318 and 319 shall not, without the consent of the Allied Powers, be extended by Turkey to States which fought on her side in the war of 1914–1919 so long as such States have not become Members of the League of Nations or been admitted to adhere to the Convention concluded at Paris on 13 October 1919 relating to Aerial Navigation.
No concession or rights in a concession relating to civil aerial navigation shall be granted by Turkey, without the consent of the Allied Powers, to nationals of States which fought on her side in the war of 1914 1919 so long as such States have not become Members of the League of Nations or been admitted to adhere to the Convention concluded at Paris on 13 October 1919 relating to Aerial Navigation.
Turkey undertakes to enforce the necessary measures to ensure that all Turkish aircraft flying over her territory shall comply with the rules as to lights and signals, rules of the air and rules for air traffic on and in the neighbourhood of aerodromes, which have been laid down in the Convention concluded at Paris on 13 October 1919 relating to Aerial Navigation.
The obligations imposed by the provisions of this Part shall remain in force until Turkey shall have been admitted into the League of Nations or shall have been authorised, in accordance with the provisions of the Convention relating to Aerial Navigation concluded at Paris on 13 October 1919, to adhere to that Convention.