Treaties, States Parties and Commentaries
Treaties and Documents
Geneva Conventions of 1949 and Additional Protocols, and their Commentaries
Historical Treaties and Documents
Rules concerning the Control of Wireless Telegraphy in Time of War and Air Warfare. Drafted by a Commission of Jurists at the Hague, December 1922 - February 1923.
Part II: Rules of Air Warfare#Chapter V: On Military Authority over enemy and neutral aircraft and persons on board. - Art. 35.
Art. 35. Neutral aircraft flying within the jurisdiction of a belligerent and warned of the approaching of military aircraft belonging to the other belligerent, must land at the nearest suitable point, failing which they expose themselves to being fired at.