Ala. Code § 41-10-498
In anticipation of issuance of bonds under this article, the authority may, from time to time, borrow such sums as may be needed for any of the purposes for which bonds are authorized to be issued under this article, and in evidence of the moneys so borrowed by issue of its promissory notes. The principal of and the interest on notes so issued may, from time to time, be refunded by refunding notes or by bonds in anticipation of the issuance of which such notes were issued. All such notes, whether initial issues or refunding issues, may bear interest from their dates until their maturities at such rate or rates as may be deemed acceptable by the board of directors, not to exceed 15 percent per annum, shall mature within three years from their date, and the principal thereof, premium, if any, and interest thereon shall be payable solely from the proceeds of the refunding notes issued to refund any such notes outstanding, the proceeds from the sale of bonds in anticipation of the issuance of which any such notes were issued and the sources from which bonds may be made payable pursuant to Section 41-10-509 of this article, all as may be provided in the resolution of the board of directors under which such notes may be issued.
Ala. Code § 41-10-498 (1975)