Tenn. Code § 6-1-303
If a majority of the votes cast in the election favor the termination of this form of government, this charter shall terminate at one (1) minute after midnight (12:01 a.m.) on the sixtieth day next following the date of the election, unless this falls upon Sunday or a holiday, in which case it shall terminate at one (1) minute after midnight (12:01 a.m.) on the next day. If, before the adoption of this charter, the municipality functioned under a different charter, then upon termination of this charter the prior charter shall become effective at the time provided for in this section. Territory previously unincorporated shall revert to that status. Another charter, however, may be adopted, and the question of whether or not another charter shall be adopted may be placed on the ballots used in the election mentioned in this section, if the petition filed requests that, and if all other necessary legal steps to adopt the other charter have been taken.
T.C.A. § 6-1-303