Ala. Code § 9-17-102

Board members shall receive travel expenses and per diem based at the rate that is currently prescribed by the state for its state employees, while attending official meetings of the board or while attending to official board business. Except that per diem paid to board members shall be no less than one full day’s per diem, and payment shall be based on attendance at a board meeting rather than the time of arrival and departure. No member of the board shall receive per diem and expense allowance for more than 30 days in any one calendar year.