1. Notwithstanding any other provisions of law to the contrary, the salary schedules contained in sections 49.082, 50.334, 50.343, 51.281, 51.282, 52.269, 53.082, 53.083, 54.261, 54.320, 55.091, 56.265, 58.095, and 473.742 shall be set as a base schedule for those county officials. Except when it is necessary to increase newly elected or reelected county officials’ salaries, in accordance with Section 13, Article VII, Constitution of Missouri, to comply with the requirements of this section, the salary commission in all counties except charter counties in this state shall be responsible for the computation of salaries of all county officials; provided, however, that any percentage salary adjustments in a county shall be equal for all such officials in that county.

2. Upon majority approval of the salary commission, the annual compensation of part-time prosecutors contained in section 56.265 and the county offices contained in sections 49.082, 50.334, 50.343, 51.281, 51.282, 52.269, 53.082, 53.083, 54.261, 54.320, 55.091, 58.095, and 473.742 may be increased by up to two thousand dollars greater than the compensation provided by the salary schedules; provided, however, that any vote to increase compensation be effective for all county offices in that county subject to the salary commission.

3. Upon the majority approval of the salary commission, the annual compensation of a county coroner of any county not having a charter form of government as provided in section 58.095 may be increased up to fourteen thousand dollars greater than the compensation provided by the salary schedule of such section.

4. The salary commission of any county of the third classification may amend the base schedules for the computation of salaries for county officials referenced in subsection 1 of this section to include assessed valuation factors in excess of three hundred million dollars; provided that the percentage of any adjustments in assessed valuation factors shall be equal for all such officials in that county.