- 94  the two segregation cells to remain out of service until such time as they are brought into conformity with the criteria set out in paragraph 52;  a maximum occupancy level to be established of four or five persons per cell (depending on the cell size) in the multi-occupancy cells in the basement area (with a possible exception as regards persons only staying a few hours in custody);  persons detained overnight to be provided with both blankets and their own mattress;  the toilet/shower facilities to be kept in a hygienic condition, and detained persons to be provided with the wherewithal to keep themselves clean;  means to be sought of enabling persons detained for more than 24 hours to be offered outdoor exercise on a daily basis;  persons detained under the Aliens legislation to be strictly separated from criminal suspects;  an information leaflet to be given to persons detained under the Aliens legislation explaining the procedure applicable to them and their related rights; this leaflet to be available in the languages most commonly spoken by such persons, and, if necessary, the services of an interpreter to be provided (paragraph 71). comments - the cell at Police Station No. 3 (Alexander Svolou St.) should only be used for temporary holding purposes (i.e. detention for a maximum of a few hours); the cell is not suitable for the detention of someone obliged to stay in police custody overnight (paragraph 72). b. transfer centres recommendations - as regards the Athens Transfer Centre:  persons detained overnight in the Centre to be provided with both blankets and their own mattress;  ventilation in the detention facilities to be improved;  detainees who do not possess such items to be provided with the wherewithal to keep themselves clean;  means to be sought of enabling detainees to be offered outdoor exercise on a daily basis;  the official capacity of the Centre's existing detention facilities to be reduced (paragraph 75);