In this Part—

• “house” means premises—

  1. a

     which are subject to a lease or occupancy arrangement by virtue of which they may be used as a separate dwelling, and

  2. b

     the owner of which would, if not registered in the register maintained by a local authority under section 82(1) of the 2004 Act, be guilty of an offence under subsection (1) of section 93 of that Act (disregarding subsection (3) of that section),

• “landlord”, in relation to a house, means the owner of the house.

In this Part references to a house being overcrowded are to be construed according to the definition of overcrowding in section 135 of the Housing (Scotland) Act 1987 (c. 26); but do not include any house to which the matters mentioned in section 139(2)(a) or (b) of that Act apply.