In their overall design, the most recent centres are similar to the prison model. They are built away from urban areas near airports. Their containing wall or fencing is sometimes made secure by rolls of concertina wire; buildings are separated from one another by fenced enclosures; the whole unit (collective areas and accommodation building corridors) are under video surveillance. As in prisons, illegal immigrant areas of detention are clearly separated. The first generally comprises a registration area, management and supervision offices and a room known as a "surveillance" room. This area is only accessible to detainees on request (by the individual or by the administration) and is subject to being accompanied by a police officer. Detainees therefore have little autonomy in relation to access to the authorities. The detention area itself is organised into a number of separate areas: - accommodation units comprising rooms, WCs, bathroom and television room; - common areas generally comprising a dining room, a lounge, laundry room and exercise courtyard and possibly a sports field; - buildings or area(s) set aside for visiting rooms and offices for the various services acting within the CRA in relation to compliance with health rights: The French Immigration and Integration office, the OFII, present under Article R. 553-13 of the CESEDA, the association approved under Article R. 553-13 of the CESEDA, medical services present under the free healthcare provisions of Article R. 553-12. Accommodation is shared. Detainees do not have a key to their room and whereas access to rooms is freely available (subject to cleaning times) during the day, opening and closing times for the accommodation unit are decided by the administration. Generally, access to the various areas in the detention area is subject to opening and closing times and being accompanied. The presence of an isolation room which is used by decision of the centre manager in the event of problems tends to strengthen the security aspect of the premises. 4.1.2 The dominance of the role of the police CRAs are under police authority. Other members of staff working there do so in roles required by law but act under the control of the centre manager. Whereas the medical service is autonomous, access to it is not freely guaranteed. The situation is even more delicate when it comes to having access to other participants. The OFII essentially acts to facilitate detainees’ stay and departure. Sometimes it acts closely with the police whose officers accompany those of the OFII in some of the procedures (the case has been cited to the inspectors of baggage collection). On the other hand when an OFII agent is absent, police regularly purchase cigarettes or enable access to telephones for new arrivals. In contrast, relations are generally more distant between associations and police. The former are often perceived by the latter as working solely to free detainees whilst the police are sometimes considered by association staff as being primarily preoccupied with succeeding in deportation. In practice, associations feel more tolerated than welcome on the premises; some mentioned various obstacles that the police put in their path to hinder their work in the name of security. The inspectors have noted that access for detainees to associations is variable, being 143