Maryland Public Utility Companies Section 9-402

      (a)      This section does not affect the duties of a railroad company or the powers of the Commission regarding joint rates.

      (b)      A railroad company shall receive freight cars of proper standard from other railroad companies at connecting points and haul the cars:

            (1)      to their destination; or

            (2)      by the route billed, to the connecting point with the next connecting carrier.

      (c)      Except on terms and conditions that the Commission establishes, railroad companies may not be required to interchange cars.