Notwithstanding the provisions of subsection (4) of Kan. Stat. Ann. §§ 74-4917 to the contrary, an individual who was born November 24, 1913, who became a member of the Kansas public employees retirement system on January 1, 1962, who was first employed by the entry date employer on July 11, 1960, and continued in employment with such participating employer until March 1, 1969, and who was again employed by a participating employer from March 13, 1972, through such member’s retirement under the Kansas public employees retirement system on May 1, 1979, shall have all retirement benefits of such member recalculated using a final average salary of twenty-eight thousand two hundred ninety-eight dollars and ninety-six cents ($28,298.96) for all participating service credit. Such recalculation shall be retroactive to the date of retirement on May 1, 1979.