225 ILCS 705/7.03
It shall be unlawful for the operator of any mine to permit any person who does not hold a certificate of competency as hoisting engineer issued by the Mining Board to hoist or lower men, or to have charge of the hoisting engine when men are underground. No certified engineer shall be required for automatically operated cages or platforms. Provided, at any slope mine where the angle of the slope is not more than twenty degrees and men are not lowered into and/or hoisted out of the mine by hoisting equipment, and there is ample room in the slope and it would be practicable in the event of an accident to remove an injured person from the mine, no hoisting engineer holding a certificate of competency issued by the Mining Board shall be required.
225 ILCS 705/7.03