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Spain
Practice Relating to Rule 68. Precautions while Receiving Parlementaires
Section A. General
Spain’s LOAC Manual (1996) states: “The commander to whom a parlementaire is sent … may take, in all cases, the measures necessary to prevent the parlementaire from taking advantage of his mission to obtain information.” 
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: “Commanders to whom parlementaires are sent … may take all necessary steps to prevent [the parlementaires] from taking advantage of their mission to obtain information.” 
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).