49 U.S. Code § 14702. Enforcement by the regulatory authority
(a) In General.—The Secretary or the Board, as applicable, may bring a civil action—
to enforce section 14103 of this title; or
to enforce this part, or a regulation or order of the Secretary or Board, as applicable, when violated by a carrier or broker providing transportation or service subject to jurisdiction under subchapter I or III of chapter 135 of this title or by a foreign motor carrier or foreign motor private carrier providing transportation registered under section 13902 of this title.
(b) Venue.—In a civil action under subsection (a)(2) of this section—
process may be served without regard to the territorial limits of the district or of the State in which the action is instituted; and