The Revenue Commissioner of Cleburne County is hereby authorized to take the necessary action to merge the budgetary operations and functions of the office. Hereafter, the office shall be financed on a pro rata share basis from the proceeds of state, county, and municipal ad valorem taxes collected in the county provided, however, state pro rata cost participation shall be limited to: (1) officials' salaries in accordance with Section 40-6A-2, and (2) the cost of appraisal and mapping functions. The funds collected by the revenue commissioner's office shall be deposited into a separate county fund hereby created which shall be named the Revenue Commissioner's Operational Fund. This section is not intended to affect any other county office of Cleburne County.