It is the duty of every local weights and measures authority in England or Wales (an "enforcement authority") to enforce the leasehold house restrictions in its area.
In this section and in sections 18 to 23 the "leasehold house restrictions" means—
section 1(1) so far as it relates to an agreement to grant a lease,
section 1(1) so far as it relates to the grant of a lease,
section 1(2) so far as it relates to an agreement to assign a lease,
section 1(2) so far as it relates to the assignment of a lease,
section 9(2) (marketing restrictions on permitted leases),
section 10(1)(a) (conditions on agreement to grant permitted lease), and
section 10(1)(b) (conditions on grant of permitted lease).
For the purposes of this section and sections 18 to 23, a breach of a leasehold house restriction is taken to occur in the area in which the house in question is located (and if the house is located in more than one area, the breach is taken to have occurred in each of those areas).
The duty in subsection (1) is subject to sections 19(4) (enforcement by another enforcement authority) and 22 (enforcement by the lead enforcement authority).