Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4911 and 74-4913 and Kan. Stat. Ann. §§ 74-4902 to the contrary, an employee who was employed by a participating employer on February 1, 1973, and who was born April 7, 1913, shall be an eligible member of the Kansas public employees retirement system as of February 1, 1973, upon the payment of the appropriate employer and employee contributions and shall be entitled to receive participating service credit for employment with such participating employer from date of membership. Upon the attainment of membership under this section, such employee and such employee’s participating employer shall be subject to the statutes governing the Kansas public employees retirement system.