Section 173 of the Principal Act is amended as follows:(a) by inserting the following subsection after subsection (1) :(1A) An application for an extension of the period for which a plumbing permit is in effect must be made at least 5 business days before the plumbing permit expires, unless the Director of Building Control has determined that special circumstances exist.(b) by omitting from subsection (2)(c) "authority; and" and substituting "authority." ;(c) by omitting paragraph (d) from subsection (2) .