Pennsylvania Statutes Title 52 P.S. Mines and Mining § 70-272. Employment of boys under eighteen years of age

No boy under eighteen years of age and no woman or girl of any age, shall be employed or permitted to be in any mine for the purpose of employment therein. Nor shall a woman or girl of any age, be employed or permitted to be in or about the outside structures or workings of a colliery for the purpose of employment, but it is provided, however, that this prohibition shall not affect the employment of a female of at least eighteen years of age in an office or in the performance of clerical work at a colliery.