In addition to the minimum salary provided in Code Section 15-16-20, the sheriff of any county who performs the duties of a sheriff for a state court, probate court, magistrate court, juvenile court, or county recorder's court under any applicable general or local law of this state shall receive for his or her services in such court or courts a salary of not less than $323.59 per month, to be paid from the funds of the county. A sheriff who serves in more than one such court shall receive only one such salary.