49 U.S.C. § 10741

1. (a)
   1. (1)A rail carrier providing transportation or service subject to the jurisdiction of the Board under this part may not subject a person, place, port, or type of traffic to unreasonable discrimination.
   2. (2)For purposes of this section, a rail carrier engages in unreasonable discrimination when it charges or receives from a person a different compensation for a service rendered, or to be rendered, in transportation the rail carrier may perform under this part than it charges or receives from another person for performing a like and contemporaneous service in the transportation of a like kind of traffic under substantially similar circumstances.
2. (b)This section shall not apply to—
   1. (1)contracts described in section 10709 of this title;
   2. (2)rail rates applicable to different routes; or
   3. (3)discrimination against the traffic of another carrier providing transportation by any mode.
3. (c)Differences between rates, classifications, rules, and practices of rail carriers do not constitute a violation of this section if such differences result from different services provided by rail carriers.