Ala. Code § 11-61A-18: Tax Exemption.

The bonds issued by the authority and the income from the bonds shall be exempt from all taxation in the state. All property and income of the authority shall be exempt from all state, county, municipal, and other local taxation, including license, privilege, or excise taxes. This exemption shall not be construed to exempt concessionaires, licensees, tenants, operators, or lessees of or on any parking facility owned by any authority from the payment of any taxes levied by the state, the county, or any municipality in the state.