The authority shall exercise, subject to this chapter, the following powers and duties necessary to the discharge of its powers and duties in corporate form:
Nothing in this chapter shall be construed to permit an authority to acquire, receive, take, hold, establish, develop, construct, reconstruct, enlarge, improve, maintain, equip, or operate any property or transit system located outside the authorizing county, except in the provision of charter service within the state.
Ala. Code § 11-49B-7 (1975)