(1) This section applies if:
(a) an offender has been sentenced to be imprisoned for an offence and a non-parole period has been fixed in respect of the sentence; and
(b) before the end of the non-parole period the offender is sentenced by a court to a further term of imprisonment.
(1A) The court must fix a new single non-parole period in respect of all the sentences the offender is to serve or complete.
(2) The new single non-parole period fixed at the time of the imposition of the further sentence:
(a) supersedes any previous non-parole period that the offender is to serve or complete; and
(b) must not be such as to render the offender eligible to be released on parole earlier than would have been the case if the further sentence had not been imposed; and
(c) must not be less than the non-parole period required to be fixed in accordance with section 53A, 54, 55 or 55A, as the case may be, in respect of the further sentence.