On parlementaires - Art. 43.
Art. 43. A person is regarded as a parlementaire who has been authorized by one of the belligerents to enter into communication with the other, and who advances bearing a white flag, accompanied by a trumpeter (bugler or drummer) or also by a flag-bearer. He shall have a right to inviolability as well as the trumpeter (bugler or drummer) and the flag-bearer who accompany him.