Notwithstanding the provisions of Kan. Stat. Ann. §§ 74-4913 to the contrary, any county engineer who first became a member of the Kansas public employees retirement system on February 1, 1967, having first been employed by a participating employer from February 1, 1966, and having been employed by another participating employer on August 1, 1962, and having been employed by another participating employer from March, 1946, until August, 1950, and having been employed by another participating employer from July 1, 1944, until January 23, 1946, shall receive prior service credit upon retirement for all services with all participating employers prior to January 1, 1962.