Section 220 ILCS 5/17-200 - Election to provide existing or future customers access to alternative retail electric suppliers(a) An electric cooperative or municipal system each may, by appropriate action and at the sole discretion of the governing body of each, from time to time make one or more elections to cause one or more of the existing or future customers of each respective system to be eligible to take service from an alternative retail electric supplier for a specified period of time. Provided that, and subject to their authority to serve customers pursuant to the Electric Supplier Act with respect to electric cooperatives and pursuant to the Illinois Municipal Code with respect to municipal systems, each shall continue to provide exclusive distribution facilities for any existing and future customers that the electric cooperative or municipal system are now or in the future otherwise entitled to serve and which customers are now or in the future receiving service provided by an alternative retail electric supplier.(b) Notification of election to provide existing or future customers access to alternative retail electric suppliers. The election by an electric cooperative or municipal system authorizing access to alternative retail electric suppliers for existing or future customers shall be made by filing notice thereof with the Commission and shall be made effective only by such filing. P.A. 90-561, eff. 12/16/1997.