Section 4.13 - Advertising(1) A chiropractor or agent, servant or employee of a licensed chiropractor or of a chiropractic facility may properly advertise the services offered, but shall not engage in advertising which is false, deceptive, misleading or unfair.(2) A chiropractor or chiropractor of record shall preserve a copy of each advertisement for a period of at least two years, and shall make a copy of the same available to the Board or its duly authorized representative upon request.(3) Violation of any provision of 233 CMR 4.13 shall be considered "unprofessional conduct" within the meaning of M.G.L. c. 112, § 93, and shall be grounds for disciplinary action by the Board.Amended by Mass Register Issue 1333, eff. 2/24/2017.