Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4911 and 74-4913 to the contrary, an employee of a participating employer who was first employed by said employer on January 7, 1941, through February 28, 1948, as an elected official and who was again employed on January 5, 1965, in another elective office and who is employed by a participating employer on the effective date of this act, shall be an eligible member of the Kansas public employees retirement system as of February 1, 1965, upon the payment of appropriate employer and employee contributions, and shall be entitled to receive participating service credit for employment with said participating employer from date of membership. Upon attainment of membership by the provisions of this act, such employee shall receive prior service credit for all service prior to January 1, 1962. The prior service benefit shall be computed by using a prior service annual salary of one thousand four hundred sixty-four dollars ($1,464).