AUTHORITY: Implementing Section 13-507 and authorized by Section 10-101 of the Public Utilities Act [220 ILCS 5/13-507 and 10-101].ILLINOIS COMMERCE COMMISSION
a) A service is not being subsidized if the total revenue resulting from the service equals or exceeds the long-run service incremental cost of providing that service.
b) A group of services is not being subsidized if the total revenue resulting from the group of services equals or exceeds the long-run service incremental cost of providing that group of services.