(1)In this Part—
“HMO” means a house in multiple occupation as defined by sections 254 to 259,
“Part 3 house” means a house to which Part 3 of this Act applies (see section 79(2)),
and any reference to an HMO or Part 3 house includes (where the context permits) a reference to any yard, garden, outhouses and appurtenances belonging to, or usually enjoyed with, it (or any part of it).
(2)For the purposes of this Part “mortgage” includes a charge or lien, and “mortgagee” is to be read accordingly.
(3)The appropriate national authority may by regulations provide for—
(a)any provision of this Part, or
(b)section 263 (in its operation for the purposes of any such provision),
to have effect in relation to a section 257 HMO with such modifications as are prescribed by the regulations.
(4)A “section 257 HMO” is an HMO which is a converted block of flats to which section 257 applies.