The judges of the supreme court and district courts, the attorney general, the dean of the university of North Dakota school of law, and the surrogate judges shall hold office as members of the judicial conference during the time they occupy their respective official positions. The term of office of the two municipal judges is two years, except that of the municipal judges first appointed after July 1, 1985, one must be appointed for a term of one year. The term of office of the five members of the bar is five years, except that of the members of the bar first appointed after July 1, 1985, one must be appointed for a term of five years, one for a term of four years, one for a term of three years, one for a term of two years, and one for a term of one year. All terms of members serving on July 1, 1985, expire on December 31, 1985. Thereafter all terms commence on January first. A vacancy must be filled by the authority originally selecting the member.