Any unit wishing to set up an endometriosis centre may need some time to establish, so to support them whilst they grow their service it is possible to register as a provisional centre. A provisional centre will be able to use the database. Data will then be audited in December of the calendar year of application. If the hospital has achieved surgical treatment of 12 cases of surgery for RVE (which require dissection of the para rectal space), along with the other criteria then they will become an accredited centre from the subsequent January.
Similarly any accredited centre who has a service but their numbers of surgical treatment of RVE fall below the required 12 cases will move from an Accredited Centre to a Provisional Centre for one year. If numbers remain below 12 cases in that year the unit will be de-recognised.