Tennessee Code Title 5. Counties § 5-5-109

(1) Elect county officials required by law to be elected by the body;

(2) Fix salaries;

(3) Appropriate money; and

(4) Transact all other business coming before the county legislative body in regular or special sessions.

(b)(1) If the members of the county legislative body are equally divided upon any question coming before them upon which they may lawfully act, then and only then, a county mayor serving as chair may cast a deciding vote.

(2) If the person serving as chair of the county legislative body is a regular member of the county legislative body, such person may not break a tie vote in the capacity of chair, but may cast a vote in the first instance as a regular member of the body.