(1)
Except as provided in Sentences (2) and (3) and unless it can be shown that the platform does not present a hazard, a guard not less than 1 070 mm high shall be provided for a platform of a demountable stage where the difference in elevation between the platform and the adjacent surface is more than 1 500 mm.
(2)
Sentence (1) need not apply at the edges of a platform of a demountable stage that face an audience.
(3)
The height of guards for stairs shall be,
(a)
not less than 920 mm measured vertically to the top of the guard from a line drawn through the outside edges of the stair nosings, and
(b)
not less than 1 070 mm around landings.