If you buy a vessel that is registered on the Australian General Shipping Register you must notify the Registrar of the change of ownership within 14 days of the purchase of the vessel through a transfer of ownership.
If the vessel’s ownership is transferred by any other lawful means, for example by court order or to the beneficiary of a deceased estate, the ownership of the vessel may be transmitted by a transmission of ownership by operation of law.
If an Australian registered vessel is sold to a non-Australian or to a new owner who does not wish to maintain the registration, an application can be made to close the registration.
Links
[1] https://www.amsa.gov.au/forms/bill-sale
[2] https://www.legislation.gov.au/Details/F2012C00465/Html/Text#_Toc329942358
[3] https://www.amsa.gov.au/vessels-operators/ship-registration/replace-your-registration-certificate
[4] https://www.amsa.gov.au/forms/declaration-transfer
[5] https://www.amsa.gov.au/forms/notice-appointment-registered-agent
[6] https://www.amsa.gov.au/vessels-operators/ship-registration/shipping-registration-fees
[7] https://www.amsa.gov.au/forms/declaration-transmission-ownership-operation-law