Tenn. Code Ann. § 7-89-120: Joint operation of authorities

(a) The powers conferred upon authorities created under this chapter may be exercised by two (2) or more such authorities acting jointly.

(b) Two (2) or more municipalities by resolution may, by acting jointly, incorporate a convention center authority to effectuate the purposes of this chapter. When two (2) or more municipalities incorporate such an authority, each and every requisite pertaining to the application for incorporation, charter and amendment of charter shall, as nearly as may be practicable, be incumbent in like manner upon each municipality joining in the creation of the authority.