Company: AILIM
Filing Date: 2025-02-18
Form Type: 10-K
Source: 0001002910-25-000055
Chunk: 36

Company: Ameren Illinois Co
Filing Date: 2025-02-18
Form: 10-K
Item: Item 8
Chunk 36
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 and related adjustments should be deferred as regulatory liabilities. See Note 2 – Rate and Regulatory Matters for additional information on Ameren Missouri’s production and investment tax credit tracker and the RESRAM. Ameren Missouri, Ameren Illinois, and all the other Ameren subsidiary companies are parties to a tax allocation agreement with Ameren (parent) that provides for the allocation of consolidated tax liabilities. The tax allocation agreement specifies that each subsidiary be allocated an amount of tax using a stand-alone calculation ratio to the total amount of tax owed by the consolidated group. Any net benefit attributable to Ameren (parent) is reallocated to the other subsidiaries. This reallocation is treated as a capital contribution to the subsidiary receiving the benefit. See Note 13 – Related-party Transactions for information regarding capital contributions under the tax allocation agreement.

NOTE 2 – RATE AND REGULATORY MATTERS

Below is a summary of our regulatory frameworks and significant regulatory proceedings and related lawsuits. We are unable to predict the ultimate outcome of these matters, the timing of final decisions of the various agencies and courts, or the effect on our results of operations, financial position, or liquidity.

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Table of Contents

Regulatory FrameworksThe following table presents the regulatory frameworks and significant regulatory recovery mechanisms for each of Ameren’s rate-regulated businesses, which are discussed in more detail below:Ameren MissouriAmeren Illinois’ electric distribution businessAmeren Illinois’ natural gas delivery businessAmeren Illinois’ and ATXI’s electric transmission businessesRegulatory framework•Historical test year ratemaking•Natural gas revenues for residential customers adjusted for sales volume deviations resulting from weather through the WNAR•MYRP•Initial rates based on future test years•Revenues decoupled from sales volumes and wholesale and miscellaneous revenues through the RBA•Future test year ratemaking•Revenues for residential and small nonresidential customers decoupled from sales volumes through the VBA•Formula ratemaking •Initial rates based on future test year•Revenues decoupled from sales volumesRegulatory mechanisms•PISARiders: •RESRAM•FAC•Rush Island Securitization•MEEIA•PGA•WNARTrackers: •Pension and postretirement benefit costs•Certain excess deferred income taxes•Renewable energy standard costs•Property taxes•Production and investment tax credits or proceeds from the sale of certain tax credits allowed under the IRA•Electric distribution service and energy-efficiency revenue requirement reconciliation adjustments(a)Riders: •R