NOTICE Duke Energy Indiana, Inc. ("Duke Energy Indiana") hereby gives notice that on December 3, 2008, a Verified Petition in Cause No. 43617 was filed with the Indiana Utility Regulatory Commission for approval of a voluntary green power and carbon credit rider, including alternative regulatory plan pursuant to Ind. Code § 8-1-2.5-1, et seq. Duke Energy Indiana, Inc. By: Jim Stanley, President d23