Ala. Code § 45-2-261.17
The authority of the Baldwin County Commission under this subpart shall not conflict with present or future regulations or policies of the Alabama Department of Health. Except as expressly set forth in this subpart, no provision of this subpart shall infringe upon the existing authority of the Baldwin County Commission to regulate the development of subdivisions under Section 45-2-260.01, and any amendments thereto, or any additional power or authority granted to the Baldwin County Commission by local legislative act. Notwithstanding any authority otherwise conferred by this subpart or any local act applicable to Baldwin County, after June 15, 1973, once a subdivision has been approved in accordance with the subdivision regulations applicable to the subdivision at the time of approval, the Baldwin County Commission and the Baldwin County Planning Commission shall have no authority to impose, by amendment to any subdivision regulations, zoning regulations, or otherwise, any new or additional front, side, rear, or wetland setback requirements on any lot contained within a previously approved subdivision which would increase the setback requirements or impose a more restrictive setback requirement on the use of the lot. After June 15, 1973, all subdivisions and lots approved in accordance with the applicable subdivision regulations prior to the date the Baldwin County zoning regulations become applicable to the subdivision or lot, or prior to the amendment of any applicable zoning regulations, shall not be subject to any new or additional front, side, rear, or wetland setback requirements which would increase the setback requirements or impose a more restrictive setback requirement on the use of the lot, and the lot shall not be deemed a nonconforming lot for the purposes of any zoning or subdivision regulations and may be used and improved without regard to the new or additional requirements and without any limitation applicable thereto based on any nonconformity with subsequently enacted regulations. No provision of this subpart shall affect any existing statute or regulation promulgated pursuant to any law creating historic or preservation districts within Baldwin County; however, historic or preservation districts are subject to the provisions of this subpart.
Ala. Code § 45-2-261.17 (1975)