(1) Except as provided in Sentences (3) to (5), the maximum area of glazed openings in an exposing building face shall,
(a) conform to Table 9.10.15.4.,
(b) conform to Subsection 3.2.3. as if the glazed openings were unprotected openings, or
(c) where the limiting distance is not less than 1.2 m, be equal to or less than the limiting distance squared.
(2) Where the limits on the area of glazed openings are determined for individual portions of the exterior wall, as described in Subclause 9.10.15.2. (1) (b) (iii), the maximum aggregate area of glazed openings for any portion shall not exceed the values in the row of Table 9.10.15.4. for the total area of the entire exposing building face based on the limiting distance of the individual portion.
(3) The limits on the area of glazed openings shall not apply to the exposing building face of a house facing a detached garage or accessory building, where,
(a) the detached garage or accessory building serves the house or an individual dwelling unit in the house,
(b) the detached garage or accessory building is located on the same property as the house, and
(c) the house is the only major occupancy on the property.
(4) Except as provided in Sentence (5), openings in a wall having a limiting distance of less than 1.2 m shall be protected by closures, of other than wired glass or glass block, whose fire-protection rating is in conformance with the fire-resistance rating required for the wall.
(5) An opening in an exposing building face not more than 130 cm2 shall not be considered an unprotected opening.