The adoption of this Part shall in no way preclude the Commission from altering or amending it, in whole or in part, or from requiring or permitting any other or additional service, equipment, facility or standard, either upon complaint, upon its own motion, or upon the application of any utility; and, furthermore, this Part shall in no way relieve any utility from any of its duties under the laws of this state.
Ill. Admin. Code tit. 83, § 600.40