Exhibit A LEGAL NOTICE Notice is hereby given that on or about March 30, 2026, and pursuant to the Orders issued by the Indiana Utility Regulatory Commission in Cause Nos. 42943 and 43046 dated December 1, 2006, Cause No. 44019 dated August 18, 2011, Cause No. 44598 dated September 9, 2015, Cause No. 45222 dated July 17, 2019 and Cause No. 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 Energy Efficiency Rider, including the Energy Efficiency Funding Component and the Sales Reconciliation Component, in Appendix I of CEI South's Tariff for Gas Service. The Energy Efficiency Rider is applicable to residential and commercial customers in CEI South's gas service area receiving service under rate schedules 110, 120 and 125. CEI South anticipates approval of the filing by May 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 March 16 2026 LSBN0477954