(2) Aisles shall:(a) comply with the requirements of sections 10, 11 and 12;
(b) be perpendicular, as far as possible, to rows of seats and located so that there be no more than 7 seats between any seat and an aisle; the foregoing provision shall not apply if the 3 following conditions are complied with:i. a door leading directly to an exit shall be provided at the ends of every 3 rows of seats; and
ii. every third row of seats shall terminate at the side walls; and
iii. the number of seats in a row shall not exceed 100;
(c) be at least 900 mm wide at the point of origin and shall increase uniformly by 25 mm every 1 m in the direction of exit; the width of aisles may be uniform if both ends thereof are clear;
(d) be not less than 1,100 mm in width and shall not be closer than 3.6 m to a stage area using scenery of scenic elements when such aisles cross other aisles;
(e) have a gradient of not more than 1 in 8 without steps; should the gradient be greater, steps may be used, provided that:i. they comply with paragraphs a and b of subsection 2 of section 21, except for the width of the tread;
ii. they be as wide as the aisle;
(f) be continuously illuminated while the building is occupied.