(225 ILCS 705/4.06) (from Ch. 96 1/2, par. 406)
    Sec. 4.06. State Mine Inspectors shall devote their whole time and attention to the duties of their office. State Mine Inspectors shall make a personal examination at least once every month, or more often if necessary, of each mine in their district. The Mining Board may also require State Mine Inspectors personally to examine any other mines in any other district. Every mine in the State shall be examined at least once every month by a State Mine Inspector.
(Source: Laws 1953, p. 701.)