"Any electric supplier or any retail consumer in the area treated by the application may intervene in these proceedings in the same manner as otherwise provided in these Rules for contested cases."
Ga. Comp. R. & Regs. R. 515-11-1-.07
Ga. L. 1973, Sec. 11, 12, pp. 217, 218; 1975, Sec. 2, p. 406.