51.—(1) Where there is a change:—
(a)in the registered particulars of a ship other than a change in the tonnage of the ship, or
(b)in the name or address of an owner entered in the Register (not being a change of ownership),
application shall be made as soon as practicable to the Registrar for the change to be recorded in the Register.
(2) Such application shall be in writing and shall subject to regulation 111 (Dispensing with production of certificate) be accompanied by the certificate of registry and such evidence as to the change as may be required by the Registrar.
(3) Where there is a change in the tonnage of a ship, it shall be resurveyed or remeasured in accordance with regulation 29 (Survey and measurement of ship).Thereafter application in a form approved by the Secretary of State shall be made as soon as practicable for the change to be recorded in the Register.The application shall be accompnanied by the certificate of survey or measurement and the certificate of registry.
(4) On recording the change in the registered particulars the Registrar shall cancel the existing certificate and issue to the owner a new certificate of registry expiring on the same date as the existing one.