(a)
Rebates and offsets
Any person who shall deliver messages for interstate or foreign transmission to any carrier, or for whom as sender or receiver, any such carrier shall transmit any interstate or foreign wire or radio communication, who shall knowingly by employee, agent, officer, or otherwise, directly or indirectly, by or through any means or device whatsoever, receive or accept from such common carrier any sum of money or any other valuable consideration as a rebate or offset against the regular charges for transmission of such messages as fixed by the schedules of charges provided for in this chapter, shall in addition to any other penalty provided by this chapter forfeit to the United States a sum of money three times the amount of money so received or accepted and three times the value of any other consideration so received or accepted, to be ascertained by the trial court; and in the trial of said action all such rebates or other considerations so received or accepted for a period of six years prior to the commencement of the action, may be included therein, and the amount recovered shall be three times the total amount of money, or three times the total value of such consideration, so received or accepted, or both, as the case may be.