The Commissioner may hold a prehearing conference if the complexity of the issues or other factors indicates that a prehearing conference would aid in the determination of issues raised by the application. The Commissioner may issue a procedural order which sets forth the procedure to be followed by the parties with regard to such issues as the pre-filing of testimony, the conduct of the hearing and the closure of the record.
13-188 C.M.R. ch. 2, § 29