Ala. Code § 23-1-363
The department may receive grants, donations, gifts, and loans of funds, monies, equipment, materials, and services from any state, county, or municipal governments or any agencies thereof, or from any other person, and the department shall keep a record of all grants and donations. The department may expend the funds solely and exclusively for the general promotion, advancement, and safety of aeronautics and for the construction, improvement, expansion, or maintenance of public use airports or other air navigation facilities or services in the state, which shall include the joint establishment or provision of aeronautical facilities in cooperation with other state or federal departments or with other political subdivisions of the state, separately or together.
Ala. Code § 23-1-363 (1975)