Ala. Code § 41-10-147
Each authority formed under this article, the property and income of the authority, all bonds issued by the authority, the income from such bonds or from any other sources, the interest and other profits from such bonds enuring to and received by the holders thereof, conveyances by and to the authority and leases, mortgages and deeds of trust by and to the authority shall be exempt from all taxation in the state. An authority shall not be obligated to pay or allow the payment of any fees, taxes or costs to the Secretary of State in connection with its incorporation or with any amendment to its certificate of incorporation or otherwise or to any judge of probate of any county in connection with the recording by it of any document or otherwise, each authority being hereby exempted from the payment of any such fees, taxes and costs. No license or excise tax may be imposed by any authority with respect to the privilege of engaging in any of the activities authorized by this article.
Ala. Code § 41-10-147 (1975)