(a) The Crenshaw County Commission may, from time to time, increase the compensation, expense allowances, or salary of the assistant district attorney, upon resolution made and a favorable vote by the majority of such commissioners. Such increases shall be in the amount the commission deems consistent with salary increases granted other county employees.
(b) This section shall be construed in pari materia with any laws or parts of laws relating to the compensation, of any nature, of the assistant district attorney, and shall be effective retroactively to October 1, 1983.