(a) Commencing on June 1, 2017, the Revenue Commissioner of Baldwin County shall be entitled to an additional expense allowance in the amount of twenty thousand dollars ($20,000) per annum, which shall be in addition to all other expense allowances, compensation, or salary provided by law. This expense allowance shall be payable in equal monthly installments from the general fund of the county.
(b) Beginning with the expiration of the term of the incumbent revenue commissioner, the annual salary for the revenue commissioner shall be increased by twenty thousand dollars ($20,000) per annum, payable in equal monthly installments from the general fund of the county and at that time, subsection (a) shall be come null and void.