(1) No internal combustion motor shall be used near sites where there are explosive dusts or flammable vapours.
(2) Air impurities produced inside any closed structure shall be removed at the emission point so that their concentration is reduced to a level below the limit values specified in Schedule I to the Regulation respecting occupational health and safety (chapter S-2.1, r. 13).
(3) As soon as the ventilation system stops, any internal combustion motor shall be immediately stopped and re-started only when the ventilation system starts to operate again.
R.R.Q., 1981, c. S-2.1, r. 6, s. 3.10.17; O.C. 885-2001, s. 377.