Each member of the county board of tax assessors shall be paid as compensation for his services an amount to be determined from time to time by the county governing authority. The compensation to be paid to a member of the board shall not be less than $20.00 per day for the time he is actually discharging the duties required of him. Attendance at required approved appraisal courses shall be part of the official duties of a member of the board and he shall be paid for each day in attendance at such courses and shall be allowed reasonable expenses necessarily incurred in connection with the courses. The compensation of the members of the board and other expenses as may necessarily be incurred in the performance of the duties of the board shall be paid from the county treasury in the same manner as other payments by the county are made.