Section 220 ILCS 5/16-125A - Consolidated billing provision for established intergovernmental agreement participants(a) The tariffs of each electric utility serving at least 1,000,000 customers shall permit governmental customers acting through an intergovernmental agreement that was in effect 30 days prior to the date specified in subsection (b) and which provides for these governmental customers to work cooperatively in the purchase of electric energy to aggregate their monthly kilowatt-hour energy usage and monthly kilowatt billing demand.(b) In implementing the provisions of this Section, the rates and charges applicable under the combined billing tariff of the serving utility in effect on May 1, 1997 shall apply to all load of eligible government customers selected by the governmental customers including, but not limited to, load served under contract.(c) For purposes of this Section, "governmental customers" shall mean any customer that is a municipality, municipal corporation, unit of local government, park district, school district, community college district, forest preserve district, special district, public corporation, body politic and corporate, sanitary or water reclamation district, or other local government agencies, including any entity created by intergovernmental agreement among any of the foregoing entities to implement the arrangements permitted by subsections (a) and (b) of this Section.(d) Electric utilities shall file tariffs that comply with the requirements of this Section within 60 days after the effective date of this amendatory Act of 1997. P.A. 90-561, eff. 12/16/1997.