All rulings, orders, decisions, and other documents issued by the Regional Administrator or Presiding Officer shall be filed with the Regional Hearing Clerk. All such documents issued by the Environmental Appeals Board shall be filed with the Clerk of the Board. Copies of such rulings, orders, decisions or other documents shall be served personally, by first class mail (including by certified mail or return receipt requested, Overnight Express and Priority Mail), by EPA's internal mail, or any reliable commercial delivery service, upon all parties by the Clerk of the Environmental Appeals Board, the Office of Administrative Law Judges or the Regional Hearing Clerk, as appropriate.