IMPORTANT INDUSTRY DEFINITIONS:
USE: to deploy something as a means of accomplishing a purpose or achieving a result.
INSTRUMENTALITY: the quality of serving as a means to an end.
DISPATCH: send off to a destination or for a purpose.
LEASE: a long-term agreement that can’t be changed.
RENTAL: a short-term agreement that can be changed at expiration.
From the FEDERAL MOTOR CARRIER SAFETY REGULATIONS
Interstate commerce means trade, traffic, or transportation in the United States—
(1) Between a place in a State and a place outside of such State (including a place outside of the United States);
(2) Between two places in a State through another State or a place outside of the United States; or
(3) Between two places in a State as part of trade, traffic, or transportation originating or terminating outside the State or the United States.
TRAILER AGREEMENTS: When parties are engaged in transportation agreements that provide for the movement of freight, including pickup and delivery and spotting of trailer equipment, under circumstances that require or permit one party to use the trailer of another to facilitate service whether it is compensated or uncompensated use. The trailer agreement stipulates to insurance coverage, indemnification for use and the extent of the allowable use of the trailer.