(220 ILCS 5/9-104) (from Ch. 111 2/3, par. 9-104)
    Sec. 9-104. No public utility shall undertake to perform any service or to furnish any product or commodity unless or until the rates and other charges and classifications, rules and regulations relating thereto, applicable to such service, product or commodity, have been filed and published in accordance with the provisions of this Act: Provided, that in cases of emergency, a service, product or commodity not specifically covered by the schedules filed, may be performed or furnished at a reasonable rate, which rate shall forthwith be filed and shall be subject to review in accordance with the provisions of this Act.
(Source: P.A. 84-617.)