Ala. Code § 23-1-381

The department may lease for operation for a term not exceeding 30 years, state-owned airports or other air navigation facilities or real property acquired or set apart for airport purposes to any person, municipality, county, airport authority, state government agency or to the federal government or agency thereof. The department may lease or assign for a term not exceeding 30 years to a person, municipality, county, airport authority, state government body, or the federal government, or to any agency of either thereof, for operation or use consistent with this article, space, area, improvements or equipment on an airport; may sell any part of an airport or other air navigation facilities to a municipality or state government, or to the United States government or any agency or instrumentality thereof, for aeronautical purposes or purposes incidental thereto. The department may confer the privileges of concessions of supplying upon the airports goods, commodities, things, services, and facilities; provided, that in each case in so doing, the public is not deprived of its rightful, equal, and uniform use thereof.