Tenn. Code Ann. § 5-16-102: Resolution of authorization

For the exercise of the powers conferred by this chapter, a county shall authorize same by resolution adopted by a majority of the county legislative body or other governing body. Such resolution shall provide for the exercise of such powers by either:

(1) Some agency of the county already in existence;

(2) A public works department to be created; or

(3) A board established as provided in § 5-16-103 .