Tennessee Code Title 5. Counties § 5-12-215

(a) If at any time the county mayor determines that the revenues or other resources are, with respect to any fund, less than was anticipated in the adopted budget, or if unanticipated expenditures arise that will likely create a budget deficit, the county mayor, upon certification to each member of the county legislative body, may impound such appropriation as may be necessary to prevent deficit operation. Such impoundment power may be overridden by a two-thirds ( 2/3 ) vote of the county legislative body, if the county legislative body makes such amendments at the same meeting to the budget as may be necessary to prevent deficit operation. Such necessary amendment requires a majority vote of the county legislative body. Notwithstanding this section, there shall be no impoundment of funds previously appropriated to the trustee, clerks of courts, register of deeds, county clerk, assessor of property or sheriff.

(b) This section is inapplicable to counties having impoundment provisions under other provisions of law.