Vermont Constitution Ch. II, § 35. Mandatory retirement

All justices of the Supreme Court and judges of all subordinate courts shall be retired at such age, not less than seventy years of age, as the General Assembly may prescribe by law, or, if the General Assembly has not so provided by law, at the end of the calendar year in which they attain seventy years of age or at the end of the term of election during which they attain seventy years of age, as the case may be, and shall be pensioned as provided by law. The chief justice may from time to time appoint retired justices and judges to special assignments as permitted under the rules of the Supreme Court.