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has caused the official seal of the Issuer to be duly impressed, or placed in facsimile, on this <br />Certificate. <br />Inure) <br />si ur <br />Mayor <br />AL <br />O orm of Paying Agent/Registrar's Authentication Certificate] <br />PAYING AGENT/REGISTRAR'S AUTHENTICATION CERTIFICATE <br />(To be executed if this Certificate is not accompanied by an <br />executed Registration Certificate of the Comptroller <br />of Public Accounts of the State of Texas) <br />It is hereby certified that this Certificate has been issued under the provisions of the <br />Certificate Ordinance described in the text of this Certificate; and that this Certificate has been <br />issued in conversion or replacement of, or in exchange for, a certificate, certificates, or a portion of <br />a certificate or certificates of a series that originally was approved by the Attorney General of the <br />State of Texas and registered by the Comptroller of Public Accounts of the State of Texas. <br />Dated: <br />(c) [Form of Assignment] <br />BOKF, NA <br />Dallas, Texas <br />Paying Agent/Registrar <br />By - . <br />Authorized Representative <br />ASSIGNMENT <br />For value received, the undersigned hereby sells, assigns and transfers unto <br />Please insert Social Security or Taxpayer Identification Number of Transferee <br />(Please print or typewrite name and address, including zip code, of Transferee.) <br />11 <br />