Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 112, § 87RR

Except as otherwise provided, no person shall engage in the business of or act as a broker or salesman directly or indirectly, either temporarily or as an incident to any other transaction, or otherwise, unless he is licensed.

No salesman may conduct or operate his own real estate business nor act except as the representative of a real estate broker who shall be responsible for the salesman and who must approve the negotiation and completion by the salesman of any transaction or agreement which results or is intended to result in the sale, exchange, purchase, renting or leasing of any real estate or in a loan secured or to be secured by mortgage or other encumbrance upon real estate. No salesman shall be affiliated with more than one broker at the same time nor shall any salesman be entitled to any fee, commission or other valuable consideration or solicit or accept the same from any person except his licensed broker in connection with any such agreement or transaction. A salesman may be affiliated with a broker either as an employee or as an independent contractor and may, by agreement, be paid as an outside salesperson on a commission-only basis but shall be under such supervision of said broker as to ensure compliance with this section and said broker shall be responsible with the salesman for any violation of section eighty-seven AAA committed by said salesman.

Except as otherwise provided no person shall recover in any suit or action in the courts of the commonwealth for compensation for services as a broker performed within the commonwealth unless he was a duly licensed broker at the time such services were performed; provided, however, that nothing contained herein shall be construed as affecting the right of a licensed salesman to recover in a suit or action against a broker on any contract or agreement with said broker.