Соответствующая норма
Spain
Practice Relating to Rule 8. Definition of Military Objectives
Section D. Weapons and weapon systems
Spain’s Field Regulations (1882) stipulates that objects useful in war, inter alia, arms, munitions, machines and tanks, are objects on which an attack is lawful. 
Spain, El Reglamento para el Servicio de Campaña, 4 January 1882, § 880.
According to Spain’s LOAC Manual (1996), “military vehicles, warships and military aircraft [and] materiel, objects and goods belonging to the armed forces and which serve no medical or religious purpose” are military objectives. 
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, § 4.5.b.(2).a.
Spain’s LOAC Manual (2007) states that “military vehicles, ships and aircraft [and] materiel, objects and property of the armed forces that are not of a medical or religious nature” are military objectives. 
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, § 4.5.b.(2).(a).