AUTHORITY: Implementing Sections 8-301, 8-505 and 13-712 and authorized by Section 10-101 of the Public Utilities Act [220 ILCS 5/8-301, 8-505, 13-712 and 10-101].ILLINOIS COMMERCE COMMISSION
Upon request of any customer, the local exchange carrier shall make a test of any call data recording device related to billing, provided such a request is not made more frequently than once every 6 months.