Ill. Admin. Code tit. 14, § 120.110
a) If the Director determines that a taxpayer who has received a credit under the Act is not complying with the requirements of the agreement or all of the provisions of the Act, the Director shall provide notice to the taxpayer of the alleged noncompliance and allow the taxpayer a hearing under the provisions of the Illinois Administrative Procedure Act. If, after notice and any hearing, the Director determines that a noncompliance exists, the Director shall issue to the Department of Revenue notice to that effect, stating the noncompliance date. [35 ILCS 45/110-70] Alleged noncompliance shall include, but not be limited to: