Company: AILIM
Filing Date: 2025-09-16
Form Type: 424B2
Source: 0001104659-25-090464
Chunk: 70

Company: Ameren Illinois Co
Filing Date: 2025-09-16
Form: 424B2
Chunk 70
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 redemption date.

With respect to any first mortgage bonds that are not senior note mortgage bonds, any terms for the optional or mandatory redemption of such first mortgage bonds will be indicated in the applicable prospectus supplement. Unless otherwise indicated in the applicable prospectus supplement, such first mortgage bonds will be redeemable only upon notice by mail not less than 10 nor more than 60 days prior to the date fixed for redemption, and, if less than all the first mortgage bonds of a series are to be redeemed, the particular first mortgage bonds to be redeemed will be selected by the mortgage trustee in such manner as it shall deem appropriate and fair. Any notice of redemption at our option may state that such redemption will be conditional upon receipt by the mortgage trustee, on or prior to the date fixed for such redemption, of money sufficient to pay the principal of, premium, if any, and interest on such first mortgage bonds and that if such money has not been so received, such notice will be of no force and effect and we will not be required to redeem such first mortgage bonds.

#### Purchase of First Mortgage Bonds
We or our affiliates may, at any time and from time to time, purchase all or some of the first mortgage bonds at any price or prices, whether by tender, in the open market, by private negotiated agreement or otherwise, subject to applicable law.

#### Mortgage Events of Default
Each of the following events constitutes an event of default under the mortgage indenture, referred to in this prospectus as a “mortgage event of default”:

•

failure to pay interest on any first mortgage bond within 45 days after the same becomes due;

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•

failure to pay principal of or premium, if any, on any first mortgage bond within three business days after its maturity;

•

certain events relating to our reorganization, bankruptcy or insolvency or the appointment of a receiver for us or any substantial part of our property; or

•

failure to perform or breach of any of our covenants or warranties in the mortgage indenture (other than a covenant or warranty a default in the performance or breach of which is discussed in the foregoing bullet points) for a period of 60 days after there has been given to us by the mortgage trustee, or to us and the mortgage trustee by the holders of at least 25% in principal amount of the outstanding first mortgage bonds, a written notice specifying such default or breach and requiring it to be remedied and stating that such notice is a