Interstate Commerce — as defined by federal motor carrier regulations, the term refers to trade,
traffic, or transportation in the United States that is between a place in a
state and a place outside of such state or is between two places in a state
through another state. An interstate shipment begins when it has started its
course to another state or has been delivered to a carrier for such
transportation and ends when it has reached the ultimate destination originally
intended by the party that controls the movement. All transportation from
beginning to end is transportation in interstate commerce. The details of the
interstate movement of goods (e.g., the number of carriers involved in the
movement, billing arrangements between the carriers, whether there is actual
physical continuity of the movement) are irrelevant in as far as the
determination that the movement is interstate commerce.