9. —The person for the time being in charge of the place where a person subject to the requirements of this Part is ordered to be imprisoned in respect of an offence (whether or not the offence that gave rise to the person's being subject to those requirements) shall notify in writing—

(a) before the date on which the sentence of imprisonment imposed on the person in respect of the first-mentioned offence expires or, as the case may be, the person's remission from the sentence begins (“the date of release”), the person that he or she is subject to the requirements of this Part, and

(b) at least 10 days before the date of release, the Commissioner of the Garda Síochána of the fact that that expiry or remission will occur in relation to the person.