S-2.1, r. 4 - Safety Code for the construction industry

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3.9.19. Mobile scaffolding: Any mobile scaffolding shall:
(a)  be equipped with a braking device which prevents the scaffolding from moving;
(b)  have the brakes applied when it is being used;
(c)  be rigid and stable; and
(d)  not be moved when a workman is on it, unless:
i.  he is advised of the move;
ii.  the smallest dimension of the base of the scaffolding is at least equal to 1/3 its height.
R.R.Q., 1981, c. S-2.1, r. 6, s. 3.9.19.