(225 ILCS 705/13.04) (from Ch. 96 1/2, par. 1304)
    Sec. 13.04. Every miner shall sound and thoroughly examine the roof of his working place before commencing work, and if he finds loose rock or other dangerous conditions, he shall not work in such dangerous place except to make such dangerous conditions safe.
(Source: Laws 1953, p. 701.)