(225 ILCS 705/24.05) (from Ch. 96 1/2, par. 2405)
Sec. 24.05.
Where rock dust is applied, it shall be distributed upon the
top, floor and sides of all open places and maintained in such quantity
that the incombustible content of the combined coal dust, rock dust and
other dust will not be less than 65%. Where methane is present in any
ventilating current, the 65% of incombustible content of such combined dust
shall be increased 1% for each 0.1% of methane.
(Source: Laws 1953, p. 701.)
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