Ala. Code § 45-8A-23.215

If the council within 30 days after the submission by the manager of his or her proposed division shall neither approve of the manager’s proposed division nor adopt a valid ordinance or resolution of disapproval then the division as proposed by the manager shall be deemed adopted and the wards of the city shall for the purpose of each subsequent election of councilmen be as described in the proposed division submitted by the manager.