The Board or its designee may upon motion, at any time during the course of the proceeding, permit such substitution of parties as justice may require.
Ga. Comp. R. & Regs. R. 360-21-.01
O.C.G.A. Secs. 43-1-4, 43-34-5, 43-34-9, 43-34-24(c), 50-13-3, 50-13-13.