(a) Of the initial members, two appointments shall be for one-year terms, three appointments shall be for two-year terms, and three appointments shall be for three-year terms. Thereafter, all terms shall be for three years. Members of the Commission shall serve no more than two consecutive three-year terms plus any initial term of less than three years. Unless provided otherwise by this act, all terms of members shall begin on January 1 and end on December 31. Members serving by virtue of elective or appointive office, except for the sheriff, may serve only so long as the officeholders hold those respective offices. The Chief Justice may remove members, with cause. Vacancies occurring before the expiration of a term shall be filled in the manner provided for the members first appointed.