(1) Except as permitted in this Subsection, foundations conforming to Sections 9.12. and 9.15. shall be provided for the support of carport and garage super-structures, including that portion beneath garage doors.
(2) Detached garages of less than 55 m2 floor area and not more than 1 storey in height that are not of masonry or masonry veneer construction are permitted to be supported on,
(a) wood mud sills, or
(b) a concrete floor slab having a minimum thickness of not less than 100 mm.