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

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239. In a shaft or a headframe served by a friction hoist, a retarding device shall be installed above the upper limit of travel and below the lower limit of travel of the conveyance and the counterweight, if any.
These devices shall brake and stop the conveyance and the counterweight, if any, before overwinding or before the underwind clearance below the lower limit of travel has been covered for its whole distance.
O.C. 213-93, s. 239.