46 U.S.C. § 41310

1. (a)A person may submit to the Federal Maritime Commission, and the Commission shall accept, information concerning complaints about charges assessed by a common carrier. The information submitted to the Commission shall include the bill of lading numbers and invoices, and may include any other relevant information.
2. (b)Upon receipt of a submission under subsection (a), with respect to a charge assessed by a common carrier, the Commission shall promptly investigate the charge with regard to compliance with section 41104(a) and section 41102. The common carrier shall—
   1. (1)be provided an opportunity to submit additional information related to the charge in question; and
   2. (2)bear the burden of establishing the reasonableness of any demurrage or detention charges pursuant to section 545.5 of title 46, Code of Federal Regulations (or successor regulations).
3. (c)Upon receipt of submissions under subsection (a), if the Commission determines that a charge does not comply with section 41104(a) or 41102, the Commission shall promptly order the refund of charges paid.
4. (d)In the event of a finding that a charge does not comply with section 41104(a) or 41102 after submission under subsection (a), a civil penalty under section 41107 shall be applied to the common carrier making such charge.
5. (e)If the common carrier assessing the charge is acting in the capacity of a non-vessel-operating common carrier, the Commission shall, while conducting an investigation under subsection (b), consider—
   1. (1)whether the non-vessel-operating common carrier is responsible for the noncompliant assessment of the charge, in whole or in part; and
   2. (2)whether another party is ultimately responsible in whole or in part and potentially subject to action under subsections (c) and (d).