5 ILCS 100/5-145

(a) An agency shall, in accordance with Section 5-35, adopt rules that implement recently enacted legislation of the General Assembly in a timely and expeditious manner. (b) Any interested person may request an agency to adopt, amend, or repeal a rule. Each agency shall prescribe by rule the procedure for consideration and disposition of the person's request. If, within 30 days after submission of a request, the agency has not initiated rulemaking proceedings in accordance with Section 5-35, the request shall be deemed to have been denied.