(225 ILCS 515/12.1) (from Ch. 111, par. 915.1)
    Sec. 12.1. The Department may refuse to issue or renew, or may suspend, the license of any person who fails to file a return, or to pay the tax, penalty or interest shown in a filed return, or to pay any final assessment of tax, penalty or interest, as required by any tax Act administered by the Illinois Department of Revenue, until such time as the requirements of any such tax Act are satisfied.
(Source: P.A. 87-205.)