LEGAL NOTICE Notice is hereby given that on or about October 31, 2025, and pursuant to the Order issued by the Indiana Utility Regulatory Commission in Cause Nos. 45447 dated October 6, 2021, Southern Indiana Gas and Electric Company d/b/a CenterPoint Energy Indiana South ("CEI South"), will file a request for approval of an update to its Tax Savings Credit Rider, in Appendix L of CEI South's Tariff for Gas Service. The Tax Savings Credit Rider will flow back the tax benefits including credits associated with the amortization of Excess Accumulated Deferred Income Tax ("EADIT Credits") liability resulting from the Tax Cuts and Jobs Act of 2017 in accordance with guidelines of Commission Orders, including Cause No. 45032-S21. The Tax Savings Credit Rider is applicable to all customers in CEI South's service area receiving service under rate schedules 110, 120, 125, 145, 160 and 170. CEI South anticipates approval of the filing by January 1, 2026, but no sooner than 30 days after receipt of the filing by the Commission. Objections to the filing should be made in writing addressed to: Dana Kosco Secretary to the Commission Indiana Utility Regulatory Commission PNC Center 101 W. Washington Street, Suite 1500 East Indianapolis, Indiana 46204 Abby R. Gray Indiana Utility Consumer Counselor Indiana Office of Utility Consumer Counselor PNC Center 115 W. Washington St., Suite 1500 South Indianapolis, Indiana 46204 Gregg M. Maurer Vice President, Indiana Gas CENTERPOINT ENERGY INDIANA SOUTH HSPAXLP October 21 2025 LSBN0388572