220 ILCS 5/16-108.25
Each electric utility that files a Multi-Year Rate Plan pursuant to Section 16-108.18 of this Act or a general rate case as described in this Act shall also file a tariff that sets forth the processes and procedures by which the electric utility will transition from its current rates and ratemaking mechanism to the new Multi-Year Rate Plan or a general rate case and rates that will take effect under that multi-year plan. The proposed tariff shall be consistent with the tariff approved by the Commission in Docket No. 20-0426 and covers the period until the new delivery rates are effective and all required processes and procedures described in the tariff have been completed.
Each electric utility subject to this Section shall file its proposed tariff no later than 30 days after the effective date of this amendatory Act of the 102nd General Assembly, and the Commission shall enter its order approving the tariff no later than 120 days after it was filed if the Commission finds that the proposed tariff is consistent with the tariff previously approved in Docket No. 20-0426 for the period until the new delivery rates are effective and all required processes and procedures described in the tariff have been completed. If the Commission does not so find, then the Commission shall approve the utility's tariff with those modifications that are required to make the proposed tariff consistent with the tariff approved in Docket 20-0426 until the new delivery rates are effective and all required processes and procedures described in the tariff have been completed.
An electric utility that has a tariff in effect on the effective date of this amendatory Act of the 102nd General Assembly that provides for the transition from its current rates and ratemaking mechanism to new base rates approved pursuant to Article IX of this Act, shall file a compliance tariff modifying its existing tariff to comply with the provisions of this Section. The compliance tariff shall go into effect on 45 days' notice.
220 ILCS 5/16-108.25