46 U.S.C. § 41102 — General prohibitions

(a) Obtaining Transportation at Less Than Applicable Rates: No one may knowingly and willfully use false billing, false weight or measurement claims, or any other unfair trick to get or try to get ocean cargo transportation for less than the rate that should apply. (b) Operating Contrary to Agreement: No one may operate under an agreement that must be filed under section 40302 or 40305 if (1) the agreement never took effect under section 40304, or was rejected, disapproved, or canceled, or (2) the operation doesn't follow the agreement's actual terms or approved changes. (c) Practices in Handling Property: A common carrier, marine terminal operator, or ocean transportation intermediary must set up, follow, and enforce fair and reasonable rules for receiving, handling, storing, and delivering property - they may not fail to do so. (d) Retaliation and Other Discriminatory Actions: A common carrier, marine terminal operator, or ocean transportation intermediary - alone or with someone else, directly or indirectly - may not (1) retaliate against a shipper, a shipper's agent, an ocean transportation intermediary, or a motor carrier by refusing or threatening to refuse available cargo space, or (2) use any other unfair or unjustly discriminatory action because that shipper, agent, intermediary, or motor carrier used another carrier, filed a complaint, or for any other reason.