Соответствующая норма
Spain
Practice Relating to Rule 46. Orders or Threats That No Quarter Will Be Given
Spain’s LOAC Manual (1996) states that it is prohibited to order that there will be no survivors, to threaten the enemy therewith or to conduct operations on this basis. 
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, § 2.3.b.(3); see also §§ 3.3.b.(5) and 7.3.a.(6).
Spain’s LOAC Manual (2007) states: “It is prohibited to declare that no quarter will be given, order that there be no survivors, threaten an adversary therewith or conduct hostilities on this basis.” 
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, § 2.3.b.(3); see also §§ 3.3.b.(5), 5.4.7, and 7.3.a.(6).
Spain’s Royal Ordinance for the Armed Forces (1978) provides that it is prohibited to declare that a war will be waged without quarter. 
Spain, Royal Ordinance for the Armed Forces, 1978, Article 138.
Spain’s Penal Code (1995), as amended in 2003, states: “Anyone who in the event of an armed conflict … orders that no quarter will be given, shall be punished with ten to 15 years’ imprisonment, without prejudice to a penalty for the results of such acts”. 
Spain, Penal Code, 1995, as amended on 25 November 2003, Article 610.