Ala. Code § 11-15-9
The corporation is authorized to issue its interest-bearing revenue warrants for the purpose of acquiring, constructing, improving, enlarging, completing and equipping one or more projects. All warrants issued by the corporation shall be limited obligations of the corporation, the principal of and interest on which shall be payable solely out of the revenues derived from the projects with respect to which they are issued. None of the warrants of the corporation shall ever constitute an obligation or debt of the state or of the county or a charge against the credit or taxing powers of the state or the county. Warrants of the corporation may be issued at any time and from time to time, may be in such form and denominations, may be of such tenor, may be payable in such installments and at such time or times not exceeding 30 years from their date, may be payable at such place or places and may bear interest at such rate or rates payable and evidenced in such manner, all as shall not be inconsistent with the provisions of this chapter and as may be provided in the proceedings of the board wherein the warrants shall be authorized to be issued. Those warrants having maturities more than 10 years after their date shall be subject to redemption at the option of the corporation as a whole or in part at the expiration of 10 years from their date and on any interest payment date thereafter at such price or prices and after such notice or notices and on such terms and in such manner as may be provided in the proceedings of the board wherein they are authorized to be issued. Warrants may be sold at either public or private sale in such manner and from time to time as may be determined by the board to be most advantageous. The corporation may pay all expenses, premiums and commissions which the board may deem necessary or advantageous in connection with the authorization, sale and issuance of its warrants. All warrants shall contain a recital that they are issued pursuant to the provisions of this chapter, which recital shall be conclusive that they have been duly authorized pursuant to the provisions of this chapter.
Ala. Code § 11-15-9 (1975)