Norma relacionada
Spain
Practice Relating to Rule 139. Respect for International Humanitarian Law
Section B. Orders and instructions to ensure respect for international humanitarian law
Spain’s LOAC Manual (1996) states:
The 1907 Hague Convention IV already provided that “the high contracting parties shall issue instructions to their Armed Forces which shall be in conformity with the rules that have been adopted”, rules that were contained in the [Hague] Conventions of 1899 and 1907. This obligation takes shape in the existence of military manuals which include the norms applicable to armed conflicts. 
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, Annex A.
Spain’s LOAC Manual (2007) states:
The Fourth Hague Convention of 1907 provides that the “Contracting powers shall issue instructions to their armed land forces which shall be in conformity with the Regulations respecting the laws and customs of war on land, annexed to the present Convention”. These regulations were established in the Hague Conventions of 1899 and 1907. The obligation was fulfilled by producing military manuals setting forth the rules applicable to armed conflict. 
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, Annex A.