(1)
"Seclusion" is the confinement of a person, at any time of the day or night, alone in a room or area from which free exit is prevented.
(2) However, seclusion does not include—(a) confinement of a person in a high security unit, or in another authorised mental health service approved by the chief psychiatrist for the purposes of this part, if the confinement is—(i) for a period, approved by the administrator of the service, of not more than 10 hours between 8p.m. and 8a.m.; and(ii) for security purposes; or(b) confinement that is authorised under a law other than this part.