The members of the Etowah County Board of Registrars shall receive in addition to the salary paid by the state and any other compensation now received by such members, a per diem supplement in the amount of ten dollars ($10) for each day such member is engaged in the discharge of his or her duties, which supplement shall be payable from the general funds of the county.
Ala. Code § 45-28-110.01 (1975)