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 IV: Hostilities. - Art. 21.
Art. 21. The use of aircraft for propaganda purposes shall not be considered as an illicit means of warfare.
The members of the crew of such aircraft are not to be deprived of their rights as prisoners of war on the ground that they have committed such an act.