(1) The sentence of imprisonment to be enforced must not be harsher, in legal nature, than the sentence of imprisonment imposed by the ICC.
(2) Without limiting subsection ( 1), the sentence to be enforced under this Part:
(a) must not be for a longer duration than the sentence imposed by the ICC; and
(b) must not be of a kind that involves a more severe form of deprivation of liberty than the sentence of imprisonment imposed by the ICC.