Tennessee Code Title 8. Public Officers and Employees § 8-1-109

(b)(1) In the event the governor is physically incapacitated due to health or is out of the state on official business and is unable to sign those items enumerated in subsection (a), the governor may authorize a power of attorney to an individual for a specified period of time for the purpose of affixing the governor's signature to such items.

(2) If the governor is physically incapacitated due to health and unable to sign such items, the power of attorney shall be accompanied by a physician's affidavit that the governor is physically incapacitated due to health and is unable to personally sign such items.

(3) The power of attorney shall only be for the affixing of the governor's signature and not for the decision of approval or nonapproval of such items. It is the express intent of this section that the governor may delegate only the affixing of the governor's signature and not the decision of approval or nonapproval of such items.