Tenn. Code Ann. § 7-33-117: Collection of assessments notwithstanding tax levy

In case the municipality levies and collects ad valorem taxes for the purpose of paying the principal and interest of any bonds, or any part of the principal and interest of the bonds, the municipality shall, nevertheless, have the power and authority to proceed with the levy and collection of assessments. Such assessments, or part of the assessments, sufficient for the purpose, shall be paid into the treasury of the municipality to reimburse the treasury for the amount thus paid out of such ad valorem taxes. Such money thus reimbursed to the treasury shall be used, under the direction of the legislative body of the municipality, for any lawful corporate purpose for which ad valorem taxes may legally be levied and collected.