Signature Title Date (i) Principal Executive Officer: /s/ Nicholas K. Akins Chairman of the Board, Chief Executive Officer and Director February 21, 2019 (Nicholas K. Akins) (ii) Principal Financial Officer: /s/ Brian X. Tierney Vice President, Chief Financial Officer and Director February 21, 2019 (Brian X. Tierney) (iii)  Principal Accounting Officer: /s/ Joseph M. Buonaiuto Controller and Chief Accounting Officer February 21, 2019 (Joseph M. Buonaiuto) (iv) A Majority of the Directors: *Nicholas K. Akins *Lisa M. Barton *Paul Chodak III *David M. Feinberg *Lana L. Hillebrand *Mark C. McCullough *Charles R. Patton Brian X. Tierney *By: /s/ Brian X. Tierney February 21, 2019 (Brian X. Tierney, Attorney-in-Fact) 58 Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof. Date: February 21, 2019 By: AEP Texas Inc. Appalachian Power Company Ohio Power Company Public Service Company of Oklahoma Southwestern Electric Power Company Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof. SIGNATURES /s/ Brian X. Tierney (Brian X. Tierney, Vice President and Chief Financial Officer)