PEOPLES ENERGY CORPORATION AND INTEGRYS ENERGY GROUP, INC. TO THE BANK OF NEW YORK TRUST COMPANY, N.A., as Trustee FIRST SUPPLEMENTAL INDENTURE Dated as of March 5, 2007Supplemental Indenture • March 9th, 2007 • Integrys Energy Group, Inc. • Electric & other services combined • Illinois
This First Supplemental Indenture, dated as of March 5, 2007 (this “First Supplemental Indenture”), by and among Peoples Energy Corporation, an Illinois corporation (“PEC”), Integrys Energy Group, Inc., a Wisconsin corporation (“Integrys”), and The Bank of New York Trust Company, N.A. (successor to Bank One Trust Company National Association) (the “Trustee”), as trustee under the Original Indenture (defined below).
