(1) If, on appeal, a court sets aside or amends a sentence of imprisonment imposed on an offender—
(a) any nonparole period to which the offender is subject is automatically cancelled; and
(b) this part applies in relation to the setting of any new nonparole period for the offender.
(2) Despite subsection (1) (b), section 65 (4) does not apply if a court amends a sentence of imprisonment on appeal and a nonparole period applied to the sentence before the appeal.