Ala. Code § 11-54B-45
At least 20 days prior to the date set for a public hearing on the proposed self-help business improvement district plan, notice of the date, time, and place of the hearing, with a description of the geographical area proposed to be included in the district, the proposed ordinance, and the self-help business district plan shall be mailed to all known owners of nonexempt real property located within the geographical area proposed to be included in the district by the municipality. The notice shall be mailed to all known owners of nonexempt real property at the address listed in the county property tax assessment records. In addition, a copy of the notice shall be posted in at least three places located within the geographical area proposed to be included in the district. A property owner's failure to receive a copy of the notice shall not constitute grounds to contest the validity of a self-help business improvement district established by ordinance. Alternatively, in the case of a district formed to increase tourism within the municipality, the notices required shall be mailed to the owners of the businesses of the designated class, but the failure of a business owner or business to receive a copy of the notice shall not constitute grounds to contest the validity of a self-help business improvement district established by ordinance.
Ala. Code § 11-54B-45 (1975)