Synopsis As Introduced Amends the Public Utilities Act. In provisions concerning services provided by electric utilities to alternative retail electric suppliers, requires that customers are enrolled with an alternative retail electric supplier through the municipal aggregation process described in the Illinois Power Agency Act when certain electric utilities file a tariff. Creates a natural gas aggregation process by municipalities, townships, and counties. Provides that the corporate authorities of a municipality, township board, or county board of a county may adopt an ordinance under which it may aggregate residential and small commercial retail natural gas loads located within the municipality, township, or county and may enter into service agreements to facilitate for those loads the sale and purchase of natural gas and related services and equipment. Provides that a single billing option shall be offered to customers for both the services provided by the alternative gas supplier and the delivery services provided by the gas utility, provided that the customers are enrolled with the natural gas aggregation process. Requires a gas utility to file a tariff that allows alternative gas suppliers to issue single bills to residential and small commercials customers, provided that the customers are enrolled with the natural gas aggregation process. Makes other changes. Effective immediately.