MA Gen L ch 211a § 16 (2021)
2021 Massachusetts General Laws|Part III - Courts, Judicial Officers and Proceedings in Civil Cases|Title I - Courts and Judicial Officers|Chapter 211a - Appeals Court|Section 16 - Services of Retired Justices

Section 16. (a) A retired chief justice or associate justice of the appeals court whose name has been placed on the list of retired justices pursuant to section sixty-five F of chapter thirty-two may be designated and assigned by the chief justice of the appeals court to perform, during his term of eligibility, such of the duties of the office of associate justice of the appeals court as may be requested of him and which he is willing to undertake, provided that no single assignment shall be for a term longer than ninety days. Such retired chief justice or associate justice may also be designated and assigned by the chief justice of the appeals court to perform, during his term of eligibility, such of the duties of judge of any lower court as may be requested of him and which he is willing to undertake provided that no single assignment shall be for a term of no longer than ninety days.  (b) In performing the services requested of him, such a retired chief justice or associate justice shall exercise all judicial power and authority pertaining to the office in which he acts, in respect of matters as to which he is designated to act, and the fact of such service shall be stated on the records of the court, but need not be separately stated in the record or docket of any particular cause or proceeding. Service under the provisions of this section shall not be counted in determining the number of offices authorized or required for any court, on which he serves, by any applicable statute.  (c) A retired chief justice or associate so serving shall be paid by the commonwealth, in addition to the pension or retirement allowance received, a per diem differential rate of compensation equivalent to one two hundred and twentieths of the balance remaining after deducting the annual pension or retirement allowance received from the current annual salary of such justice if not retired. The per diem differential rate of compensation shall be paid monthly from Judiciary appropriated funds.  Such retired justice shall be entitled to all other benefits of a regular incumbent of the appeals court and shall be reimbursed for expenses incurred while performing such services at any place other than his place of residence. While so serving he shall be entitled to receive such staff support, clerical assistance and facilities as are customarily available to judges of the court on which he serves.  (d) During the temporary disability of the chief justice or an associate justice of the appeals court, a majority of the justices of the supreme judicial court may designate a justice appointed to the trial court to perform such duties of the office of associate justice of the appeals court as may be necessary to ensure the speedy dispatch of judicial business; provided, however, that any such trial court justice so appointed shall receive a salary commensurate with the salary of the justice or chief justice of the appeals court who is so disabled; and, provided further, that nothing contained herein shall be construed to limit the right of such disabled justice to receive his full salary, health or disability benefits or retirement benefits if otherwise provided by law.