No person under the age of 18 shall be employed to work or labor in or about any coal mine in this state.
(Code 1896, §2933; Code 1907, §1035; Acts 1911, No. 493, p. 500; Code 1923, §1724; Acts 1935, No. 193, p. 241; Code 1940, T. 26, §158; Acts 1949, No. 207, p. 242, §106; Acts 1971, No. 2486, p. 3983; Acts 1975, 4th Ex. Sess., No. 147, p. 2866, §1.)