(225 ILCS 710/45.18)
(from Ch. 96 1/2, par. 4271)
An easily legible copy of the above code, or of any special code adopted in any mine, shall be printed in letters at least one-half inch
high, on a board or metal plate not less than 18 by 18 inches, and shall be
securely posted in the engine room, at the collar of the shaft and at each
level or station. The superintendent of the mine shall be responsible for
the carrying out of this rule.
(Source: Laws 1945, p. 1035.)