47 U.S.C. § 504 : US Code - Section 504: Forfeitures

    (a) Recovery
      The forfeitures provided for in this chapter shall be payable
    into the Treasury of the United States, and shall be recoverable,
    except as otherwise provided with respect to a forfeiture penalty
    determined under section 503(b)(3) of this title, in a civil suit
    in the name of the United States brought in the district where the
    person or carrier has its principal operating office or in any
    district through which the line or system of the carrier runs:
    Provided, That any suit for the recovery of a forfeiture imposed
    pursuant to the provisions of this chapter shall be a trial de
    novo: Provided further, That in the case of forfeiture by a ship,
    said forfeiture may also be recoverable by way of libel in any
    district in which such ship shall arrive or depart. Such
    forfeitures shall be in addition to any other general or specific
    penalties provided in this chapter. It shall be the duty of the
    various United States attorneys, under the direction of the
    Attorney General of the United States, to prosecute for the
    recovery of forfeitures under this chapter. The costs and expenses
    of such prosecutions shall be paid from the appropriation for the
    expenses of the courts of the United States.
    (b) Remission and mitigation
      The forfeitures imposed by subchapter II of this chapter, parts
    II and III of subchapter III of this chapter, and sections 503(b)
    and 507 of this title shall be subject to remission or mitigation
    by the Commission under such regulations and methods of
    ascertaining the facts as may seem to it advisable, and, if suit
    has been instituted, the Attorney General, upon request of the
    Commission, shall direct the discontinuance of any prosecution to
    recover such forfeitures: Provided, however, That no forfeiture
    shall be remitted or mitigated after determination by a court of
    competent jurisdiction.
    (c) Use of notice of apparent liability
      In any case where the Commission issues a notice of apparent
    liability looking toward the imposition of a forfeiture under this
    chapter, that fact shall not be used, in any other proceeding
    before the Commission, to the prejudice of the person to whom such
    notice was issued, unless (i) the forfeiture has been paid, or (ii)
    a court of competent jurisdiction has ordered payment of such
    forfeiture, and such order has become final.