Tenn. Code Ann. § 7-35-421

This part creates an additional and alternate method for the acquisition of waterworks or a sewerage system by any incorporated city or town and does not include, amend, alter, or repeal any other statute. A proceeding is not required for either the acquisition of a waterworks or sewerage system, or for the issuance of bonds under this part, except as provided by this part or § 68-221-1017, notwithstanding any other law to the contrary.