5. For the purposes of article 3, the BRS Act applies to the WECA as if —
(a)references to the Greater London Authority in section 2(1) (levying authorities) and in section 5(2) (prospectus) of the BRS Act include references to the WECA;
(b)references in that Act to a lower-tier authority are, in relation to the WECA, references to a district council whose area forms part of the WECA’s area.