Section 600.8131 - Sixty-fourth-a district and sixty-fourth-b district(1) The sixty-fourth-a district consists of the county of Ionia, is a district of the first class and has 1 judge.(2) The sixty-fourth-b district consists of the county of Montcalm, is a district of the first class, and has 1 judge.Add. 1968, Act 154, Imd. Eff. 6/17/1968 ;--Am. 1970, Act 49, Imd. Eff. 1/1/1971 ;--Am. 1990, Act 54, Imd. Eff. 4/11/1990 ;--Am. 1992, Act 50, Imd. Eff. 5/12/1992 ;--Am. 1994, Act 138, Imd. Eff. 5/26/1994.