111.Section 64 deals with a situation not currently catered for under the land registration system, where something happens in the course of the ownership of the property that itself makes the title bad. The most obvious examples are: (1) when a lease is subject to a right of re-entry for breach of covenant and the tenant commits a breach of covenant entitling the landlord to end the lease; and (2) where a freehold title is subject to the payment of a rentcharge (with a right of re-entry if that payment is not made) and the rentcharge is not paid. Section 64 enables the registrar to record in the register the fact that a right to determine a registered estate has arisen. Rules will govern when the registrar is under a duty to make the entry, and how such entries are made and removed.