Ala. Code § 9-9-36

Each and every person owning land in the district who shall fail to pay to the district treasurer the full amount for which his land is liable, as aforesaid, within the time above specified shall be deemed as consenting to the issuance of water management bonds; and, in consideration of the right to pay his proportion in installments, he thereby waives his right of defense to the payment of any tax which may be levied for the payment of bonds because of any irregularity, illegality or defect in the prior proceedings except in case of an appeal as provided in this article, which is not affected by this waiver.