Ala. Code § 45-37A-54.69: Contracts.

Contracts of the authority shall be executed in the name of the authority by the chair of the authority and attested by the secretary of the authority. Except for bonds, it is not required that the seal be impressed or printed on contracts. It is further provided hereby that, except for bonds, the authority may provide by resolution for a different form for the execution of contracts, and for the execution thereof by an officer or agent other than the chair and secretary. But in no event shall a contract, irrespective of its form and of the persons executing the same, be binding unless such contract was authorized or ratified by the authority.