Historically, most sleep technologists have received informal training in a sleep laboratory or sleep center via an apprenticeship method of instruction.  While being a registered Polysomnographic Technologist (RPSGT) is not required at this time to enter into the sleep profession, it is rapidly becoming the preference of sleep disorder centers. The eligibility requirements to take the RPSGT examination of the Board of Registered Polysomnographic Technologists (BRPT) http://www.brpt.org/ were updated in 2007. These requirements allow candidates who have completed a comprehensive training program accredited by the commission on Accreditation of Allied Health Educational Programs (CAAHEP) to qualify for the board exam without a required period of paid experience on the job or the need for other allied health credentials.