49 U.S.C. § 15721

(1) Carrier, lessor.—

The terms “carrier” and “lessor” include a receiver or trustee of a pipeline carrier and lessor, respectively.

(2) Lessor.—

The term “lessor” means a person owning a pipeline that is leased to and operated by a carrier providing transportation under this part.

(3) Association.—

The term “association” means an organization maintained by or in the interest of a group of pipeline carriers that performs a service, or engages in activities, related to transportation under this part.