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

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468. Work in a heading or in the sinking of a shaft may not be abandoned or stopped before:
(1)  the material broken at the time of firing of the last shot have been removed from the heading and the bottom of the shaft;
(2)  any working face or bottom of the shaft has been examined to detect the presence of explosives or blasting agents in the misfires or in cut-off holes.
O.C. 213-93, s. 468.