Unless otherwise provided by these rules, in all hearings, the testimony of witnesses shall be taken orally before the Board or its designee and presentation of all documentary and other evidence shall be done before the Board or its designee.
Ga. Comp. R. & Regs. R. 150-20-.01
O.C.G.A. §§ 43-11-7, 43-11-47, 50-13-13, 50-13-15.