Tenn. Code § 7-65-123
The powers conferred by this chapter shall be in addition and supplementary to, and the limitations in this chapter shall not affect the powers conferred by, any other general, special or local law. Projects may be acquired, purchased, constructed, reconstructed, improved, bettered and extended and bonds may be issued under this chapter for such purposes, notwithstanding that any other general, special or local law may provide for the acquisition, purchase, construction, reconstruction, improvement, betterment and extension of a like project, or the issuance of bonds for like purposes, and without regard to the requirements, restrictions, limitations or other provisions contained in any other general, special or local laws.
T.C.A. § 7-65-123