Tennessee Code Title 5. Counties § 5-1-138

(a) As used in this section:

(b) The local rules of procedure adopted by a county legislative body become the temporary local rules of procedure for a newly elected county legislative body until acted upon pursuant to subsection (c).

(c) Within ninety (90) days of convening a newly elected county legislative body, the county legislative body shall adopt local rules of procedure by majority vote.

(d) If changes to the local rules of procedure are proposed during that term after the adoption pursuant to subsection (c), the changes must be approved by a two-thirds ( 2/3 ) majority vote of the county legislative body.

(e) If a question arises that is not addressed in the local rules of procedure, the question is governed by the latest edition of Robert's Rules of Order.