Mass. Gen. Laws ch. 221B, § 7A

Each order or judgment of a hearing officer described in section six shall be presented to a justice of the division in which he is sitting within twenty-four hours for review and approval. The justice shall examine the record and sign each order or judgment unless he makes written findings that the hearing officer committed an error of law, that the decision is not supported by substantial evidence, or that it constitutes an abuse of discretion.