Mínimum criteria in deprivation of liberty preserve confidentiality, keeping a copy to be able to evidence submission and the dates. 245. At all centres minors should be furnished with written information on the possibility of instituting an habeas corpus proceeding, to ensure that their internment conforms to law and that their fundamental rights are respected. 246. Likewise, we wish to point out the importance of all centres delivering on admission an informative dossier on the rights, duties and rules for cohabitation, disciplinary system, etc., adequate for the inmates as regards its terms and language and, if possible that its reading be enabled and encouraged. 247. It has been observed, and this is a reason for concern of the NPM, that, in general, free lawyers do not visit the minors for the time during which they are serving these measures, which should be rectified. 248. The disciplinary regime of minors should be addressed to ensure their dignity and they should never be deprived of their rights to be fed, compulsory education, communications and visits, contemplated by law, and contacts with the external work may never be restricted or denied as a disciplinary measure as contemplated by the CPT in paragraph 34 of its 9th General Report (CPT/Inf (99) 12). 249. We should like to point out the importance of having the stages of the disciplinary proceedings that may be instituted perfectly investigated and recorded in documentary form, placing on record the possibility of reducing the penalty for good behaviour of the minor and that these be reported to the court and public prosecutor’s office, and to the lawyers of the inmate minors. 250. In addition, all centres must have a record book to enter any disciplinary proceedings that may be instituted in it. 251. In turn, the decisions given in disciplinary proceedings should be signed by the minor or, as appropriate, include the statement that he refuses to sign. 252. The punishment of separation from the group should be applied for therapeutic and security reasons, to protect the minor and other persons, and should be proportionate to the infringement and for the shortest possible time, being supervised by the management of the centre and followed up daily by a medical practitioner and a psychologist, who will report on the physical and mental state of the minor, and on the advisability of suspending, modifying or rendering null and void the imposed penalty. These penalties should be served in the rooms of the minors or, as appropriate, at rooms with features similar to those of any other room of the centre, eliminating any items that could be hazardous for the safety of the minors and with sufficient light, temperature and ventilation, eliminating those that do not meet such minimum conditions. 91