Mass. Gen. Laws ch. 151A, § 41
(e) The manner in which evidentiary hearings are presented before the board of review, and the conduct of such hearings, shall be in accordance with regulations prescribed by the board for determining the rights of the parties. Such regulations prescribed by the board of review need not conform with common law or statutory rules of evidence and other technical rules of procedure provided that such regulations conform with the provisions of clauses (1) to (5), inclusive, of subsection (b) of section thirty-nine of this chapter and chapter thirty A.
A full and complete record shall be kept by the board of review of hearings held by said board. All testimony, records, investigatory reports and documents in the possession of the board shall be made part of the proceeding. Any recorded testimony need not be transcribed unless a party so requests it. The party requesting a transcript shall pay for the costs of transcription.