A commissioner shall receive no compensation for his services but shall be entitled to the necessary and actual expenses, including traveling expenses, incurred in the discharge of his duties. Each commissioner shall hold office until his successor has been appointed and has been qualified. A certificate of the appointment or reappointment of any commissioner shall be filed with the clerk of the municipality and such certificate shall be conclusive evidence of the due and proper appointment of such commissioner.
SDCL 11-8-43