The Civil Service Commission shall have duties and powers as follows:
Upon the failure or refusal to obey a subpoena, a petition shall be prepared by the party serving the subpoena for enforcement in the circuit court of the county in which the person to whom the subpoena was directed either resides or has his or her principal place of business.
Not less than five days before the petition is filed in the appropriate court, it shall be served on the person along with a notice of the time and place the petition is to be presented.
Following a hearing on the petition, the circuit court shall have jurisdiction to enforce subpoenas issued pursuant to this Section.
On motion and for good cause shown the Commission may quash or modify any subpoena.
All hearings shall be public. A decision shall be rendered within 60 days after receipt of the transcript of the proceedings. The Commission shall order the reinstatement of the employee if it is proven that the provisions of the Personnel Code or of the rules of the Department of Central Management Services relating to layoff have been violated or have not been complied with. In connection therewith the Commission may administer oaths, subpoena witnesses, and compel the production of books and papers.
20 ILCS 415/10