Tenn. Code Ann. § 7-60-207

The validity of the authorization and issuance of the bonds or notes authorized under this chapter shall not be dependent on or affected in any way by proceedings relating to home mortgages or qualified home improvement loans for which the bonds or notes are issued. Bonds or notes issued under this chapter bearing the signatures of officers in office on the date of the signing of the bonds or notes shall be valid and binding obligations, notwithstanding that before the delivery of the bonds or notes any or all of the persons whose signatures appear on the bonds or notes have ceased to be officers of the county issuing the bonds or notes.