Tenn. Code Ann. § 2-6-205

In the case of individuals who, pursuant to § 2-2-107(a) are registered to vote in a municipality as nonresident property owners, the municipal legislative body may, by ordinance, direct such voters to cast the municipal ballots as absentee by mail ballots. Any municipal ordinance adopted pursuant to this section must be adopted and filed with the county election commission office no later than sixty (60) days before the election. Upon the filing of the municipal ordinance, a nonresident property owner may not thereafter vote in the election except by absentee ballot. No later than forty-five (45) days before the election, the election commission shall mail a notice to each voter registered as a nonresident property owner of the municipality advising the voter of the voting process and include an application for ballot for the municipal election. The election commission shall maintain a record of the municipal ordinance and shall not require a municipality to adopt subsequent ordinances, unless the municipality has repealed such ordinance since the last election.