12-180-12 Me. Code R. § 17
A party to a proceeding before the Board or the executive director may request the attendance of witnesses voluntarily or by subpoena. If witnesses or documents are sought by subpoena, the requesting party must first make a written request of the Board or presiding official for the issuance of the subpoena. When the subpoena is issued, it is the responsibility of the requesting party to serve the subpoena or cause it to be served on the named individual. When a witness is subpoenaed, the witness fee and transportation allowance established by 16 M.R.S.A. §251 must be provided at the time the subpoena is served. If a party subpoenas a witness and then decides not to call that witness, the requesting party must give notice of its intent not to call that witness to the other parties to the proceeding, and to the Board or the executive director, at least 48 hours prior to the time the witness was scheduled to appear. A subpoena for documents will ordinarily require the production of the documents at the prehearing conference.
12-180 C.M.R. ch. 12, § 17