49 USC 46309 – Concession and price violations
(a)
(1) knowingly and willfully offers, grants, or gives, or causes to be offered, granted, or given, a rebate or other concession in violation of this part; or
(2) by any means knowingly and willfully assists, or willingly allows, a person to obtain transportation or services subject to this part at less than the price lawfully in effect.
(b)
(1) knowingly and willfully solicits, accepts, or receives a rebate of a part of a price lawfully in effect for the foreign air transportation of property, or a service related to the foreign air transportation; or
(2) knowingly solicits, accepts, or receives a privilege or facility related to a matter the Secretary of Transportation requires be specified in a currently effective tariff applicable to the foreign air transportation of property.