49 U.S. Code § 13531 - General jurisdiction
(a)In General.—The Secretary and the Board have jurisdiction, as specified in this part, over service that a freight forwarder undertakes to provide, or is authorized or required under this part to provide, to the extent transportation is provided in the United States and is between—
a place in a State and a place in another State, even if part of the transportation is outside the United States;
(b)Exemption of Certain Air Carrier Service.—
Neither the Secretary nor the Board has jurisdiction under subsection (a) of this section over service undertaken by a freight forwarder using transportation of an air carrier subject to part A of subtitle VII of this title.