Ala. Code § 11-62-21
This chapter shall be construed liberally to effect its purposes and neither this chapter nor anything herein contained is or shall be construed as a restriction or limitation upon any powers which any authority might otherwise have under any laws of the state, and the provisions of this chapter are cumulative to any such powers.
This chapter does and shall be construed to provide a complete, additional, and alternative method for the doing of the things authorized thereby and shall be regarded as supplemental and additional to other laws. However, the issuance of bonds, notes, and other obligations of any authority under the provisions of this chapter need not comply with the requirements of any other law of the state generally applicable to the issuance of bonds, notes, and other obligations by other public corporations organized under the laws of the state.
Ala. Code § 11-62-21 (1975)