110 ILCS 70/45
Any person who shall be served with a subpoena to appear and testify, or to produce books and papers, issued by the Merit Board, or by any member thereof or by any board or person acting under the orders of the Merit Board in the course of an investigation, conducted under any of the provisions of this act, and who shall refuse or neglect to appear, or to testify, or to produce books and papers relevant to said investigation, as commanded in such subpoena, shall be guilty of a misdemeanor and shall, on conviction, be punished as provided in Section 46 of this act.
The fees of witnesses for attendance and travel shall be the same as the fees of witnesses before the circuit court of this state.
Any circuit court of this State, upon application of any member of the Merit Board, or any person acting under the orders of the Merit Board may, in its discretion, compel the attendance of witnesses, the production of books and papers, and giving of testimony before the Board or before any member of the Board, any investigating board or officer, by an attachment for contempt or otherwise, in the same manner as production of evidence may be compelled before the court. Every person who, having taken oath or made affirmation before a member of the board or an officer appointed by the board authorized to administer oaths shall wilfully swear or affirm falsehood shall be guilty of perjury and upon conviction shall be punished accordingly.
110 ILCS 70/45