162Criminal justice certificates to be cancelled

162  Criminal justice certificates to be cancelled  (1) If the presence in Australia of a non‑citizen in respect of whom a criminal justice certificate has been given is no longer required for the purposes for which it was given, then:  (a) if it was given under section 145 or 147—the Minister; or  (b) if it was given under section 146 or 148—an authorised official; is to cancel it.  (2) Before cancelling a certificate given under section 146 or 148, an authorised official is, an adequate time before doing so, to tell the Secretary:  (a) when it is to be cancelled; and  (b) the expected whereabouts of the non‑citizen when it is cancelled; and  (c) the arrangements for the non‑citizen’s departure from Australia.