Interchange means -
(1) The act of providing intermodal equipment to a motor carrier pursuant to an intermodal equipment interchange agreement for the purpose of transporting the equipment for loading or unloading by any person or repositioning the equipment for the benefit of the equipment provider, but it does not include the leasing of equipment to a motor carrier for primary use in the motor carrier's freight hauling operations; or
(2) The act of providing a passenger-carrying commercial motor vehicle by one motor carrier of passengers to another such carrier, at a point which both carriers are authorized to serve, with which to continue a through movement.
(3) For property-carrying vehicles, see § 376.2 of this subchapter.
49 CFR § 390.5
Unless specifically defined elsewhere, in this subchapter: