Sec. 31.18. In all mines starting operation after July 1, 1947, the ventilating fan shall be installed on the surface in a fireproof building.
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/il/chapter-225/act-705/31-18A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Sec. 31.18. In all mines starting operation after July 1, 1947, the ventilating fan shall be installed on the surface in a fireproof building.