Copies of all pleadings, briefs,, motions or documentary evidence filed by a party with the Board shall also be served upon all other parties to the proceeding or upon their attorneys, if represented by counsel.
Except for the complaint, service upon a party or an attorney may be effected by, and is complete when the paper is mailed, delivered in-hand or delivered to the office of the party or attorney. For violation of this rule the presiding officer may refuse to accept the material filed in the record.
01-020 C.M.R. ch. 3, r. 23