Treaties, States Parties and Commentaries
Treaties and Documents
Geneva Conventions of 1949 and Additional Protocols, and their Commentaries
Historical Treaties and Documents
Convention (IX) concerning Bombardment by Naval Forces in Time of War. The Hague, 18 October 1907.
Chapter II : General provisions - Art. 6.
Art. 6. If the military situation permits, the commander of the attacking naval force, before commencing the bombardment, must do his utmost to warn the authorities.