Exhibit 32

UNISOURCE ENERGY CORPORATION

TUCSON ELECTRIC POWER COMPANY

STATEMENTS OF CORPORATE OFFICERS

(Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002)

Each of the undersigned, Paul J. Bonavia, Chairman of the Board and Principal Executive Officer of UniSource Energy Corporation and Tucson Electric Power Company (each a “Company”), and Kevin P. Larson, Senior Vice President and Principal Financial Officer of each Company, hereby certifies, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that each Company’s Annual Report on Form 10-K for the year ended December 31, 2011, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained therein fairly presents, in all material respects, the financial condition and results of operations of such Company.

February 27, 2012

/s/ Paul J. Bonavia

Paul J. Bonavia

Chairman of the Board and

Principal Executive Officer

UniSource Energy Corporation

Tucson Electric Power Company

/s/ Kevin P. Larson

Kevin P. Larson

Senior Vice President and

Principal Financial Officer

UniSource Energy Corporation

Tucson Electric Power Company