Effective July 1, 1969, the provisions of s. 122.32 relative to future officials and employees of any county which elected to accept social security under the provisions of chapter 650 prior to June 19, 1957, shall be of no further force and effect. On and after July 1, 1969, all new and future officers and employees of any county coming under the provisions of s. 122.32 shall become members of division B unless some new consolidated state retirement system becomes effective on that date.