83 Ill. Adm. Code 761.150
Service
Section 761
Section 761.150 Service
a) All documents shall be deemed filed on the date received by
the Chief Clerk of the Commission. Service on the Chief Clerk of the
Commission cannot be made by telephone facsimile. All documents shall be
served upon the parties to the arbitration proceeding on the day they are filed
with the Chief Clerk of the Commission.
b) Proof of service of any paper shall be by certificate of
attorney, acknowledgement of receipt, or affidavit.