Ala. Code § 11-98-13

On a biennial basis, if not more frequently, the 911 Board shall retain an independent, third-party auditor for the purposes of receiving, maintaining, and verifying the accuracy of any and all information, including all proprietary information, that is required to be collected, or that may have been submitted to the board by voice communication providers and districts, and the accuracy of the collection of the 911 service charge required to be collected.