Tenn. Code Ann. § 11-14-203: Approval by planning authority

(a) No private property shall be acquired by any county or municipality under this part until the planning commission having jurisdiction over the land involved, shall have, by resolution, declared such acquisition to be in the public interest.

(b) Where no such planning commission legally exists, the Tennessee local government planning advisory committee shall exercise the same authority as where such municipal or regional commission otherwise legally exists.