Tennessee Code Title 42. Aeronautics § 42-4-102

(a) It is declared that airport authorities created pursuant to this chapter shall be public and governmental bodies acting as agencies and instrumentalities of the creating and participating municipalities, and that the acquiring, operating and financing of airports and related facilities by such airport authorities are declared to be for a public and governmental purpose and matters of public necessity. The acquisition of any land, or interest in land, pursuant to this chapter, the planning, acquisition, establishment, development, construction, improvement, maintenance, equipment, operation, regulation, and protection of airports, air navigation facilities, and avigation easements, including the acquisition or elimination of airport hazards and the exercise of any other powers granted in this chapter to authorities are declared to be public and governmental functions, exercised for a public purpose, and matters of public necessity. All land and other property and privileges acquired and used by or on behalf of an authority in the manner and for the purposes enumerated in this chapter shall and are declared to be acquired and used for public and governmental purposes and as a matter of public necessity.

(b) The property and revenues of the authority or any interest therein shall be exempt from all state, county and municipal taxation.