Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4913 to the contrary, any county employee who became a member of the Kansas public employees retirement system on January 1, 1967, the county’s entry date, and who was first employed by said county April 1, 1949, through November 30, 1949, and was reemployed February 1, 1952, through April 30, 1959, and who was again reemployed November 20, 1961, shall upon retirement be granted prior service credit for all employment with said county performed prior to January 1, 1967, whether such employment was continuous or not.