- 42 72. With respect to the pre-departure centres, the CPT recommends that the Greek authorities take the necessary steps to ensure that: - official occupancy rates are revised so as to offer a minimum of 4 m² of space per detainee in multi-occupancy accommodation, and are respected in practice; all multi-occupancy rooms are equipped with tables and chairs commensurate with the number of persons detained and each person is provided with personal lockable space; detainees are offered clean bedding and the ability to wash their clothes; all detainees are offered at least one hour of outdoor exercise every day; a programme of activities (educational, recreational and vocational) is developed in each centre; at least one common association room, equipped with television and games, is established in every centre; every centre is equipped with a multi-faith room; detainees are provided with sufficient quantities of personal hygiene and cleaning products (including washing powder). The delegation observed that maintenance was a major issue in all the centres visited (nonfunctioning electrical sockets, broken plumbing, broken lightbulbs, etc.). The CPT recommends that steps be taken to ensure that regular maintenance work is carried out in all predeparture centres. b. special holding facilities for irregular migrants 73. At the Athens airport holding facility, the situation has not improved since the 2011 visit. The unit for irregular migrants (i.e. those who had attempted to enter or leave the country with false documents) was holding 26 men in nine cells (each measuring 9 m²) on 14 April 2013. Detained persons were not offered any outdoor exercise and were only let out of the cells for a few minutes in the morning and the evening in order to clean themselves; once again, the delegation heard many complaints that detainees were not let out of the cells when they requested to go to the toilet. Local staff said that the average length of detention would not exceed a few days; however, consultation of the custody register revealed that four Syrians had been held in the centre for periods of two to four months, another foreign national had been held for more than six months and many others had been detained for more than one month. Further, at times, between seven and 11 persons were held in these cells for prolonged periods, as was the case in December 2012, January 2013 and at the beginning of April 2013; such a gross level of overcrowding leading to 1 m² or less of living space per person constitutes in itself inhuman treatment. A cell of 9 m² should not accommodate more than two persons. It is also essential that an outdoor exercise yard be brought into service.