Соответствующая норма
Spain
Practice Relating to Rule 123. Recording and Notification of Personal Details of Persons Deprived of Their Liberty
Spain’s LOAC Manual (1996) provides:
Each Party to a conflict is required to furnish the persons under its jurisdiction who are liable to become prisoners of war, with an identity card showing the owner’s surname, first names, rank, serial number or equivalent, and date of birth. The identity card may, furthermore, bear any other information the party to the conflict may wish to add concerning persons belonging to its armed forces. 
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, § 8.2.(d).2.
Concerning interned persons, the manual states: “Family or identity documents in the possession of internees may not be taken away without a receipt being given.” 
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, § 6.8.(d).
Spain’s LOAC Manual (2007) states:
Each party to a conflict is required to provide the persons under its jurisdiction who are liable to become prisoners of war with an identity card showing the holder’s surname, first names, rank, army, regimental, personal or serial number or equivalent information, and date of birth.
The identity card may, furthermore, bear any other information the party to the conflict may wish to add concerning persons belonging to its armed forces. 
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, § 8.2.d.(3).(a).
The manual also states that, in internment camps: “Family documents must be kept by internees. If such documents are taken from them, a receipt must be given.” 
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, § 6.8.d.
Spain’s Royal Ordinances for the Armed Forces (2009) states that members of the armed forces “[m]ust employ all means [when detained] to avoid responding to any other questions that do not concern providing his or her name and surname, rank, affiliation and date of birth”. 
Spain, Royal Ordinances for the Armed Forces, 2009, Article 109.