The appropriate national authority may by order make such provision as it considers appropriate for and in connection with—
determining whether a dwelling is overcrowded for the purposes of Part 10 of the Housing Act 1985 (c. 68) (overcrowding);
introducing for the purposes of Chapter 3 of Part 4 of this Act a concept of overcrowding similar to that applying for the purposes of Part 10 (and accordingly removing the discretion of local housing authorities to decide particular issues arising under those sections);
securing that overcrowding in premises to which Chapter 3 of Part 4 of this Act would otherwise apply, or any description of such premises, is regulated only by provisions of Part 10.
An order under this section may, in particular, make provision for regulating the making by local housing authorities of determinations as to whether premises are overcrowded, including provision prescribing—
factors that must be taken into account by such authorities when making such determinations;
the procedure that is to be followed by them in connection with making such determinations.
An order under this section may modify any enactment (including this Act).
In this section—
any reference to Part 10 of the Housing Act 1985 includes a reference to Part 10 as modified by an order under this section; and
"enactment" includes an enactment comprised in subordinate legislation (within the meaning of the Interpretation Act 1978 (c. 30)).