Соответствующая норма
Spain
Practice Relating to Rule 22. The Principle of Precautions against the Effects of Attacks
Spain’s LOAC Manual (1996) requires that “all necessary precautions be taken in order to protect civilians and civilian objects from the effects of attacks”. 
Spain, Orientaciones. El Derecho de los Conflictos Armados, Publicación OR7-004, 2 Tomos, aprobado por el Estado Mayor del Ejército, División de Operaciones, 18 March 1996, Vol. I, § 4.5.a.(2).
Spain’s LOAC Manual (2007) states: “To the extent possible … precautionary measures must be taken to protect civilians and civilian property from the effects of attacks”. 
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.a.(2); see also § 2.4.c.(6).
Upon ratification of the 1977 Additional Protocol I, Spain interpreted the term “feasible” as meaning that “the matter in question is feasible or possible in practice, taking into account all the circumstances prevailing at the time, including humanitarian and military aspects”. 
Spain, Interpretative declarations made upon ratification of the 1977 Additional Protocol I, 21 April 1989, § 3.