(1) This section applies (instead of section 10 (3)) if a court sentences a young offender to imprisonment and the young offender is under 21 years old when the sentence is imposed.
(2) The sentence must be served by full-time detention at a detention place unless the young offender is—
(a) released from full-time detention under this Act or another territory law; or
(b) transferred to a correctional centre under the Children and Young People Act 2008
.