Mass. Gen. Laws ch. 151A, § 63

The commissioner, subject to the approval of the commission on administration and finance, shall cause to be printed in proper form for distribution to the public the full text of this chapter, the general rules, annual reports, regulations, classifications, rates and rules of procedure thereunder, and any other material he deems relevant and suitable, and shall distribute the same, free of charge, upon request. Unless the contrary is provided hereunder, or by the rules or regulations of the commissioner, such printing and distributions shall be deemed a sufficient publication of the same.