Ala. Code § 16-18-20
Upon the adoption by the board of any resolution providing for the issuance of bonds, the authority may, in its discretion, cause to be published once a week for two consecutive weeks, in a newspaper published in the determining municipality, or if there is no newspaper published in the determining municipality then in a newspaper published in the county in which the determining municipality or any part thereof is located, a notice in substantially the following form (the blanks being properly filled in) at the end of which shall be printed the name and title of either the chairman or secretary of the authority:
"____, a public corporation and a political subdivision of the State of Alabama, on the ____ day of ____, authorized the issuance of $____ principal amount of revenue bonds of the said public corporation for purposes authorized in the act of the Legislature of Alabama under which the said public corporation was organized. Any action or proceeding questioning the validity of the said bonds, or the pledge and the indenture to secure the same, or the proceedings authorizing the same, must be commenced within 20 days after the first publication of this notice."
Any action or proceeding in any court to set aside or question the proceedings for the issuance of the bonds referred to in said notice or to contest the validity of any such bonds, or the validity of the pledge and indenture made therefor, must be commenced within 20 days after the first publication of such notice. After the expiration of the said period, no right of action or defense questioning or attacking the validity of the said proceedings or of the said bonds or the said pledge or indenture shall be asserted, nor shall the validity of the said proceedings, bonds, pledge or indenture be open to question in any court on any ground whatsoever except in an action commenced within such period.
Ala. Code § 16-18-20 (1975)