Mínimum criteria in deprivation of liberty proposed for each minor, in accordance with his educational needs for the duration of the measure of internment (Individual Program for Execution of Internment Measure Programa Individualizado de Ejecución de Medida de Internamiento –PIEM). In this context, it would be advisable for the scope of privileges or setback, as appropriate, to be conveniently established with adequate safeguards, to prevent the making of arbitrary decisions by personnel. 256. Body searches and searches of clothes, belongings and facilities of minors are a matter of concern, to ensure that no actions are carried out violating the right to personal privacy, and it is considered necessary to remind that these should conform to the provisions of law and of regulation. 257. It must be remembered that, in those cases in which it is considered necessary to carry out a nude body search, prior authorisation from the manager of the centre must be obtained and prior report to the duty juvenile court and to the duty public prosecutor must be made, explaining the reasons rendering the search advisable and reporting the results to the court authority. These searches should always be carried out in a closed place, without presence of other minors, with personnel of the educational team of the same sex and a security guard, providing the juvenile with an overall or bathrobe to preserve his privacy. 258. We must point out the importance of video-surveillance at these centres. Indeed, the video-surveillance and video-recording system would have to cover all common areas such as dining rooms, workshops, etc., and all rooms used for provisional isolation and mechanical restraint, since this will enable supervision of the manner in which these contention means were applied and their duration. In this context, the inside of the rooms of the minors and the rooms for family visits should be excluded from such coverage, to ensure the right to personal and family privacy. 259. The protocols for activation of recordings should contemplate the obligation to extract and keep the pictures and sound recordings reflecting any incident that may occur with a minor deprived of liberty. Video-surveillance screen of an isolation room in Aranguren (Navarre) 93