Section 710 ILCS 30/10-20 - Challenge procedure(a) The parties are free to agree on a procedure for challenging an arbitrator, subject to the provisions of subsection (c) of this Section.(b) If the parties are unable to reach an agreement, a party that intends to challenge an arbitrator shall, within 15 days after becoming aware of the constitution of the arbitral tribunal or after becoming aware of any circumstance referred to in subsection (b) of Section 10-15 of this Act, send a written statement of the reasons for the challenge to the arbitral tribunal. Unless the challenged arbitrator withdraws from office or the other party agrees to the challenge, the arbitral tribunal shall decide on the challenge.(c) If a challenge under any procedure agreed upon by the parties or under the procedure of subsection (b) of this Section is not successful, the challenging party may request, within 30 days after having received notice of the decision rejecting the challenge, the court specified in Section 1-30 of this Act to decide on the challenge, which decision is not subject to appeal; provided that this provision shall not preclude the parties from raising any ground for setting aside or refusing to recognize or enforce an arbitral award to the extent otherwise permitted under applicable federal law. While the request is pending, the arbitral tribunal, including the challenged arbitrator, may continue the arbitral proceedings and make an award. P.A. 90-631, eff. 7/24/1998.