Règle correspondante
Spain
Practice Relating to Rule 8. Definition of Military Objectives
Section C. Places where armed forces or their materiel are located
According to Spain’s LOAC Manual (1996), “establishments, constructions and positions where armed forces are located [and] establishments and installations of combat support services and logistics” 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 “establishments, constructions and positions where armed forces are located [and] establishments and facilities of combat support services and logistics services” 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).