Соответствующая норма
Spain
Practice relating to Rule 66. Non-Hostile Contacts between the Parties to the Conflict
Section C. Definition of parlementaires
Spain’s Field Regulations (1882) provides that a parlementaire is “the official sent to the enemy with formal orders and powers to negotiate agreements, capitulations; to request suspension of arms, truce or armistice; to present claims or observations about violations of agreements”. 
Spain, El Reglamento para el Servicio de Campaña, 4 January 1882, § 901.
Spain’s LOAC Manual (1996) defines parlementaires as “the persons authorized by one of the parties to enter into negotiations with the adversary, and who advances bearing a white flag”. 
Spain, Orientaciones. El Derecho de los Conflictos Armados, Publicación OR7-004, 2 Tomos, aprobado por el Estado Mayor del Ejército, Division de Operaciones, 18 March 1996, Vol. I, § 2.6.c.(1).
Spain’s LOAC Manual (2007) states: “Parlementaires are those who have been authorized by one of the parties to the conflict to enter into communication with the other, bearing a white flag.” 
Spain, Orientaciones. El Derecho de los Conflictos Armados, Tomo 1, Publicación OR7–004, (Edición Segunda), Mando de Adiestramiento y Doctrina, Dirección de Doctrina, Orgánica y Materiales, 2 November 2007, § 2.6.c.(1); see also §§ 5.2.a.(1).(b) and 7.5.c.