Ala. Code § 16-13-120
In any county in which a special license or privilege tax or excise tax may now or hereafter be levied, or the proceeds of any ad valorem tax equivalent shall be apportioned, by local act of the Legislature of Alabama, the county board of education of the county or the city board of education of any city in the county, as the case may be, may sell and issue interest-bearing warrants, the principal of and the interest on which shall be payable solely from that portion of the proceeds from such tax or tax equivalent which may be apportioned and paid to such board of education. Any such warrants may bear such rate or rates of interest not exceeding 12 percent per annum, payable semiannually, may be in such denomination or denominations, may mature over such period of time not exceeding 30 years after their date, may be sold at public or private sale at such price or prices, may be made redeemable prior to maturity at the option of the issuing board at such redemption price or prices and on such conditions, may be made payable within or without the state, and may contain such details, all as the board of education issuing such warrants may provide in the proceedings wherein the warrants are authorized to be issued. The board of education issuing such warrants shall secure the payment of the principal thereof, and interest thereon by a pledge of the tax proceeds so apportioned, out of which such warrants are made payable; and, if more than one such pledge shall be made with respect to the proceeds from the same tax, then such pledges shall take precedence in the order in which they are made. Said warrants shall not be general obligations of the issuing board of education but shall be payable solely from the limited source herein specified. Said warrants shall be preferred claims against the tax or tax-equivalent proceeds so apportioned and out of which they are made payable and shall have preference over claims for salaries or other operating expenses or any other purpose. The proceeds from the sale of any such warrants shall be used by the board of education issuing such warrants for the purpose or purposes for which the tax or tax-equivalent proceeds so apportioned to such board of education are permitted by any such local act to be used. Each such board of education may in like manner from time to time sell and issue refunding warrants for the purpose of refunding a like or greater principal amount of warrants then outstanding which were issued under the provisions of this section and Section 16-13-121 and the interest accrued thereon and any premium necessary to be paid thereon. The provisions of said sections applicable to the original issue of warrants so refunded shall likewise be applicable to any such refunding warrants except that the proceeds from the sale of such refunding warrants shall be used only to retire the warrants refunded thereby.
Ala. Code § 16-13-120 (1975)