Appointment of chief judges of judicial

administrative districts; term. The supreme court shall appoint a chief judge in each judicial administrative district, who shall be a circuit judge within the district, for a term of 2 years, commencing August 1 of the year of appointment. The supreme court shall fill vacancies as they occur. A chief judge is subject to removal by the supreme court and may not serve more than 3 consecutive terms. In exceptional circumstances the supreme court, in its discretion, may extend a chief judge's service beyond the 3 term limit.