225 ILCS 710/6.01

It is hereby the duty of the operator of each mine to forward to the Department of Natural Resources, not later than the 15th day of each month a report in writing on a form supplied by the Department of Natural Resources, showing for the preceding calendar month the tonnage of product, the average number of people employed, and the number and nature of fatal and all other accidents. All such reports shall be filed in and become a part of the records of the Department of Natural Resources. Blank forms for such reports shall be furnished by the State.