Mass. Gen. Laws ch. 33A, § 36: Commander-in-chief or the adjutant general may prescribe rules

Article 36. Commander-in-chief or the adjutant general may prescribe rules.

Pretrial, trial and post-trial procedures, including modes of proof, for courts-martial cases arising under this code, and for courts of inquiry, may be prescribed by the commander-in-chief or the adjutant general by regulations, or as otherwise provided by law, which shall apply the principles of law and the rules of evidence generally recognized in military criminal cases in the courts of the armed forces but which may not be contrary to or inconsistent with this code.