49 U.S.C. § 14904 — Additional rate violations

(a) Rebates by Agents. A person -- or an officer, employee, or agent of that person -- who (1) offers, grants, gives, solicits, accepts, or receives a rebate or concession in violation of a motor carrier provision of this part, subject to jurisdiction under subchapter I of chapter 135, or (2) by any means assists or permits another person to get transportation subject to that subchapter at less than the rate in effect under section 13702 of this title, is liable to the United States for a civil penalty of $200 for the first violation and $250 for each violation after that. (b) Undercharging. (1) Freight forwarder. A freight forwarder providing service subject to jurisdiction under subchapter III of chapter 135 -- or an officer, agent, or employee of that freight forwarder -- who assists a person in getting, or willingly permits a person to get, service at less than the rate in effect under section 13702, is liable for a civil penalty of not more than $500 for the first violation and not more than $2,000 for each violation after that. (2) Others. A person who by any means gets, or attempts to get, service under subchapter III of chapter 135 at less than the rate in effect under section 13702, is liable for the same civil penalty: not more than $500 for the first violation and not more than $2,000 for each violation after that.