S-2.1, r. 14 - Regulation respecting occupational health and safety in mines

Full text
388. The hoistman shall be alerted when a door or a loading chute:
(1)  is not obstructing the free passage of a conveyance in a shaft, by means of 2 identical green lights connected in parallel or by a permanent visual signal on a screen;
(2)  is obstructing the free passage of a conveyance in a shaft by means of 2 identical red lights connected in parallel or by a permanent visual signal on a screen.
A device shall automatically stop the hoist before the conveyance can come into contact with a door or a loading chute obstructing the shaft.
O.C. 213-93, s. 388; O.C. 465-2002, s. 26.