Section 13 ceases to apply in relation to a long residential lease of a house if—
the term of the lease expires (but see subsection (2)), or
the lease otherwise ceases to exist.
Where the term of the lease expires, section 13 continues to apply for as long as the lease is continued under a relevant enactment.
Section 13 ceases to apply in relation to a long residential lease of a house if the tenant for the time being under the lease acquires the freehold estate and any superior leasehold estate or estates in the land comprised in the lease (whether or not by exercising the right to acquire).
In subsection (2) "relevant enactment" means—
Part 1 of the Landlord and Tenant Act 1954, or
Schedule 10 to the Local Government and Housing Act 1989.