(1)It shall be the duty of the Authority and every Federated State so to exercise their powers in relation to the railways with which they are respectively concerned as to afford all reasonable facilities for the receiving, forwarding, and delivering of traffic upon and from. those railways, including the receiving, forward in and delivering of through traffic at through rates, and as to secure that there shall be between one railway system and another no unfair discrimination, by the granting of undue preferences or otherwise, and no unfair or uneconomic competition.