Ala. Code § 11-14-18

Any securities issued by any county payable from or secured by a pledge of any part of the tax proceeds of the special tax authorized to be levied under the second proviso of Section 215 of the Constitution of Alabama of 1901, as amended by Amendment 208, and Sections 11-14-10, 11-14-11, and 11-14-16, are hereby exempted from the laws of the State of Alabama governing usury or prescribing or limiting interest rates, including, without limitation, the provisions of Chapter 8 of Title 8 of this Code.