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

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453.2. In the presence of sulphurous rock or sulphurous rock dust, the following events must be entered in a register:
(1)  any reaction observed of an explosive in a drill hole;
(2)  any predetonation; and
(3)  any explosion or dust fire resulting from blasting.
O.C. 221-2009, s. 33.