Comings and goings
An unregistered vessel that is entitled to be registered cannot leave an Australian port for an international destination. Customs officials will refuse to issue any such vessel with a Certificate of Clearance. However, in certain circumstances a temporary pass may be issued to the ship, or provisional registration can be arranged to enable it to undertake a voyage beginning before the registration procedure has been fully completed.
Likewise, no ship is allowed to leave a foreign port where there is an Australian diplomatic representative unless it has either been registered or issued with a provisional registration certificate.