79.—(1) An application to record in the register the determination of a registered estate must be accompanied by evidence to satisfy the registrar that the estate has determined.
(2) Subject to paragraph (3), if the registrar is satisfied that the estate has determined, he must close the registered title to the estate and cancel any notice in any other registered title relating to it.
(3) Where an entry is made under rule 173 the registrar need not close the registered title to the estate until a freehold legal estate in land in respect of the land in which such former estate subsisted has been registered.