19-20-715. Earned compensation -- limitations. Compensation in excess of the limitations set forth in section 401(a)(17) of the Internal Revenue Code as adjusted for cost-of-living increases must be disregarded for individuals who are not eligible employees. The limitation on compensation for eligible employees may not be less than the amount that was allowed to be taken into account under this chapter on July 1, 1993. For the purposes of this section, an eligible employee is an individual who was a member in the retirement system prior to July 1, 1996. Any changes in the maximum limits under section 401(a)(17) of the Internal Revenue Code must be applied prospectively.