(1)Service. (a)General Rule. Service of all documents or other papers relating to any proceeding, including complaints, orders, decisions, pleadings, motions, processes, notices, briefs, claims of appeal, and exhibits, shall be by personal delivery, by first-class mail, or by Electronic Medium.(b)On Whom Served. All such documents or other papers shall be served by the person filing the same on every person who has theretofore entered an appearance in the proceeding. If a person appears after the document or other paper has been filed, a copy of all filings previously made shall be furnished to such person, if he or she so requests. Proof of service shall accompany all filings when made. If service in accordance with 207 CMR 1.05(1) is deemed by any person to be too burdensome, application may be made to the Department or to the Presiding Officer for relief.(c)Service by the Department. A copy of any document or other paper served by the Department, showing the addressees to whom the document or other paper was delivered, shall be placed in the Department's files and shall be prima facie evidence of service and the date thereof.Adopted by Mass Register Issue 1347, eff. 9/8/2017.