Operation of the Security Services of Immigration Detention Facilities” was prepared, which sought to establish for the first time a common framework of operation of these centres as well as set rules with regard to the behaviour of the staff and the rights and duties of the detainees. In terms of duration, detention in pre-removal centres and special holding facilities has no specific pattern and depends on influx and capacity. The maximum allowed length of detention is 18 months, although, as mentioned earlier, in the course of 2014 there have been cases where this was exceeded. 86 Table 14: Current capacity in migrant detention centres Pre-Removal Centre Current Capacity Amygdaleza 2,000 Corinth 1,024 Fylakio 374 Komotini 540 Parenesti 557 Xanthi 490 TOTAL 4,985 Aliens Special Current Capacity Holding Facilities Central- P.Ralli 373 Amygdaleza Minors 40 Aspropyrgos 140 Amarousio 42 Elliniko- (Old facility) 63 Elliniko (New facility) 123 Piraeus (closed since 56 2012) TOTAL 837 *Data provided by the Greek Police, 1 April 2014, 24 June 2014 86 Police Reply, 24 June 2014 Page 42