Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4911 and 74-4913 and Kan. Stat. Ann. § 74-4902, and any amendments to such statutes, to the contrary, an employee who was born July 7, 1920, and who was employed by a participating employer on February 1, 1980, shall be a member of the Kansas public employees retirement system as of February 18, 1980. Upon the attainment of membership under this section and payment of employee and employer contributions, such employee and such employee’s participating employer shall thereafter be governed by the provisions of the Kansas public employees retirement system, Kan. Stat. Ann. § 74-4901 et seq., and acts amendatory thereof or supplemental thereto.