(1) For the purposes of section 19 of the Act, the relevant building surveyor must decide an application for a building permit—
(a) in the case of a Class 1 or 10 building, within 10 business days after the relevant day; or
(b) in any other case, within 15 business days after the relevant day.
(2) In this regulation the "relevant day" means the earlier of—
(a) the day on which all reports and consents required to be supplied by reporting authorities in relation to the application are received by the relevant building surveyor; or
(b) the day by which the reports and consents referred to in paragraph (a) must be supplied to the relevant building surveyor.