Ala. Code § 41-10-272

For the purpose of providing funds for the payment of the principal of, premium, if any, and interest on the bonds issued by the authority under the provisions of this article, there is hereby created and irrevocably pledged to the payment of such obligations a special and continuing fund which shall consist of all receipts and income from rents contracted for and received by the authority under leases of the judicial facilities constructed with the proceeds from the sale of bonds. Moneys on deposit in said fund shall not be diverted or used for any other purpose if needed for the payment of the principal of, premium, if any, or interest on the bonds of the authority.