49 USC 11141 - Definitions
In this subchapter
(1) the terms rail carrier and lessor include a receiver or trustee of a rail carrier and lessor, respectively;
(2) the term lessor means a person owning a railroad that is leased to and operated by a carrier providing transportation subject to the jurisdiction of the Board under this part; and
(3) the term association means an organization maintained by or in the interest of a group of rail carriers providing transportation or service subject to the jurisdiction of the Board under this part that performs a service, or engages in activities, related to transportation under this part.