All rates and fares effective in this State, except in cases where otherwise specified in the tariff or schedule of rates on file with the Commission and otherwise authorized by law, shall apply in either direction, over the same line, between the same points.
Ga. Comp. R. & Regs. R. 515-16-9-.02
Authority O.C.G.A. Secs. 46-7-18, 46-7-19, 46-7-27.