SIXTH SUPPLEMENTAL INDENTURE FROM WISCONSIN PUBLIC SERVICE CORPORATION TO (SUCCESSOR TO FIRSTAR BANK, NATIONAL ASSOCIATION AND FIRSTAR BANK, MILWAUKEE, N.A., NATIONAL ASSOCIATION) TRUSTEE Dated as of December 1, 2006 SUPPLEMENTAL TO INDENTURE Dated as...Integrys Energy Group, Inc. • February 28th, 2007 • Electric & other services combined
This SIXTH SUPPLEMENTAL INDENTURE is made as of the 1st day of December, 2006, by and between WISCONSIN PUBLIC SERVICE CORPORATION, a corporation duly organized and existing under the laws of the State of Wisconsin (the “Company”), and U.S. BANK NATIONAL ASSOCIATION (successor to Firstar Bank, National Association and Firstar Bank Milwaukee, National Association), a national banking association duly organized and existing under the laws of the United States, as trustee (the “Trustee”).
