Related Rule
Practice relating to Rule 66. Non-Hostile Contacts between the Parties to the Conflict
Section C. Definition of parlementaires
Argentina’s Law of War Manual (1969) defines a parlementaire as “an individual authorized by one of the belligerents to enter into communication with the other and who advances bearing a white flag”. 
Argentina, Leyes de Guerra, RC-46-1, Público, II Edición 1969, Ejército Argentino, Edición original aprobado por el Comandante en Jefe del Ejército, 9 May 1967, § 6.001.