Common use of SUPPLEMENTAL AND ADDITIONAL INDENTURE OF LEASE Clause in Contracts

SUPPLEMENTAL AND ADDITIONAL INDENTURE OF LEASE. This Amendment and Supplement No. 3 to the Supplemental and Additional Indenture of Lease dated March 7, 2011 (this “Amendment”) is by and between the Navajo Nation (formerly known as The Navajo Tribe of Indians), acting through the Navajo Nation Council for and on behalf of the Navajo Nation (hereinafter referred to as the “Nation”), as lessor, and Arizona Public Service Company (“APS”), El Paso Electric Company, Public Service Company of New Mexico, Salt River Project Agricultural Improvement and Power District, and Tucson Electric Power Company (formerly known as Tucson Gas & Electric Company) (hereinafter, collectively, together with their successors and assigns, referred to as the “Lessees,” and each individually referred to as a “Lessee”). The Nation and the Lessees are hereinafter collectively referred to as the “Parties.” The Parties agree as follows:

SUPPLEMENTAL AND ADDITIONAL INDENTURE OF LEASE. This Amendment and Supplement No. 3 2 to the Supplemental and Additional Indenture of Lease dated March 7, 2011 (this “Amendment”) is by and between the Navajo Nation (formerly known as The Navajo Tribe of Indians), acting through the Navajo Nation Council Council, for and on behalf of the Navajo Nation (hereinafter referred to as the “Nation”), as lessor, and Arizona Public Service Company (“APS”), El Paso Electric Company, Public Service Company of New Mexico, Salt River Project Agricultural Improvement and Power District, Southern California Edison Company (“Edison”), and Tucson Electric Power Company (formerly known as Tucson Gas & Electric Company) (hereinafter, collectively, together with their successors and assigns, referred to as the “Lessees,” and each individually referred to as a “Lessee”). The Nation and the Lessees are hereinafter collectively referred to as the “Parties.” The Parties agree as follows: