A copy of the answer and all other pleadings, notices, motions, briefs, memoranda and other documents filed by any party with the Executive Director shall be served upon all other parties to the proceeding, including counsel for the Board, by personal delivery or by certified mail, return receipt requested.
Ga. Comp. R. & Regs. R. 480-41-.02
O.C.G.A. §§ 26-4-27, 26-4-28, 26-4-28.1, 50-13-13.