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Mass. Gen. Laws ch. 147, § 50A

Courses of instruction in boxing, kickboxing, mixed martial arts and other unarmed combative sports or matches or exhibitions sponsored by youth organizations, private clubs, law enforcement agencies, etc

Courses of instruction in boxing, kickboxing, mixed martial arts and other unarmed combative sports, or sparring matches or exhibitions sponsored and conducted by recognized boys and girls clubs, youth organizations, private clubs and athletic associations, schools and colleges, law enforcement agencies or municipal or state parks and recreation departments, under the supervision of qualified instructors and directors, may be conducted in a city or town without requiring a license under section 33.

Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.