Mass. Gen. Laws ch. 33A, § 38
Article 38. Duties of trial counsel and defense counsel.
(b)
(3) The accused may be represented:
(6) The accused is not entitled to be represented by more than one military counsel. However, the person authorized under regulations prescribed under article 27 of this code to detail counsel, in that person's sole discretion:
(c) In any court-martial proceeding resulting in a conviction, the defense counsel: