- 22 The CPT welcomes the existence of the above-mentioned provisions. Action is needed to ensure that they are applied in practice. This will require the adoption of detailed standards on conditions of detention for law enforcement agency establishments in general. Such standards could, in particular, provide a benchmark against which to measure accommodation currently available and serve to clarify the minimum standards which ought to apply in newly-built facilities. The CPT recommends that the Greek authorities produce detailed standards on conditions of detention for all law enforcement agencies in Greece and that, in so doing, the criteria advocated by the Committee be taken fully into account; compliance with such standards and with instructions regarding conditions of detention should be effectively monitored (cf. also in this connection, paragraph 22). 39. Finally, the CPT must reiterate that persons should not be detained for prolonged periods (i.e. more than a few days) in police stations/headquarters; the physical surroundings and the level of activities which can be offered in such facilities will almost invariably fall distinctly short of what a detainee held for a prolonged period is entitled to expect. The CPT recommends that the Greek authorities take immediate steps to bring to an end the practice of holding persons, in particular immigration detainees, for prolonged periods in ordinary law enforcement agency detention facilities; they should be accommodated in centres specifically designed for such use, taking due account of the criteria repeatedly advanced by the CPT (cf. CPT/Inf (2001) 18, Part II, paragraphs 35 and 36). 4. Safeguards against the ill-treatment of detained persons a. introduction 40. In previous visit reports, the CPT examined in detail the formal safeguards against illtreatment which are offered to persons detained by the law enforcement agencies in Greece and their operation in practice. The Committee has placed particular emphasis on three fundamental rights, namely the right of detained persons to inform a close relative or another third party of their choice of their situation, to have access to a lawyer, and to have access to a doctor. It is equally fundamental that persons detained by the law enforcement agencies be informed without delay of all their rights, including those mentioned above.