Docket shipments list: every container with its ETA, remaining free time, clearance stage, document count and status.
Shipments — free time remaining, next to how far the paperwork has got.

Unjust and unreasonable practice: the five-part test

An unjust and unreasonable practice is the conduct 46 U.S.C. 41102(c) prohibits: a carrier, terminal operator or intermediary failing to establish, observe and enforce just and reasonable practices for receiving, handling, storing or delivering property. The Commission's interpretation at 46 CFR 545.4 requires five elements, and the second is why one bad invoice is not a case.

Unjust and Unreasonable Practice
A failure by an ocean carrier, marine terminal operator or ocean transportation intermediary to establish, observe and enforce just and reasonable practices for receiving, handling, storing or delivering property, prohibited by 46 U.S.C. 41102(c). A claim needs five elements.
What one invoice can carry, and what a claim needsRespondent is a regulated entity: One disputed invoice — yes; A 41102(c) claim — yes. Normal, customary and continuous: One disputed invoice — no; A 41102(c) claim — yes. Relates to handling property: One disputed invoice — yes; A 41102(c) claim — yes. Unjust or unreasonable: One disputed invoice — partly; A 41102(c) claim — yes. Proximate cause of the loss: One disputed invoice — partly; A 41102(c) claim — yes. Route that actually fits: One disputed invoice — Charge complaint; A 41102(c) claim — Reparations claimOne disputed invoiceA 41102(c) claimRespondent is aregulated entityNormal, customary andcontinuousRelates to handlingpropertyUnjust or unreasonableProximate cause of thelossRoute that actually fitsCharge complaintReparations claim
What one invoice can carry, and what a claim needs The five elements 46 CFR 545.4 requires for reparations under 46 U.S.C. 41102(c), against what a single disputed invoice can establish on its own.

Almost every argument about an unfair demurrage bill ends up at the same statute. 46 U.S.C. 41102(c) says a common carrier, marine terminal operator or ocean transportation intermediary “may not fail to establish, observe, and enforce just and reasonable regulations and practices relating to or connected with receiving, handling, storing, or delivering property.” Demurrage and detention are charges for the use of terminal space and of containers, so they are inside that wording without any stretching.

What gets quoted far less often is the Commission’s own interpretation of what it takes to win under it.

Five elements, and the second one is the wall

46 CFR 545.4 interprets the statute “to require the following elements in order to establish a successful claim for reparations”, and then lists five. Not a balancing exercise, not a list of factors: elements.

The five elements, in the regulation's order1. A regulated respondent; 2. Normal, customary and continuous; 3. Receiving, handling, storing or delivering; 4. Unjust or unreasonable; 5. Proximate cause of the claimed loss1A regulated respondentcarrier, marine terminaloperator or intermediary2Normal, customary andcontinuousa practice, not a single event3Receiving, handling,storing or deliveringdemurrage and detention sithere4Unjust or unreasonablewhat 545.5's incentiveprinciple interprets5Proximate cause of theclaimed lossthe element that needs datedrecords
The five elements, in the regulation's order 46 CFR 545.4. All five, not the most persuasive one. The incentive principle at 545.5 interprets the fourth.

Element (b) is the one that ends most conversations: the claimed acts or omissions must be occurring on a normal, customary, and continuous basis. A single invoice, however indefensible, is an event. The statute is about a practice.

That distinction is not a technicality invented to keep importers out. 41102(c) is addressed to a failure to “establish, observe, and enforce” practices, which is a failure of standing arrangements. One clerk billing one box wrongly on one Tuesday is not the thing the sentence describes.

Which means the incentive principle is one element, not the test

This is worth stating plainly because the opposite impression is everywhere, including in a good deal of vendor writing on the subject.

46 CFR 545.5 is the interpretive rule that gives us the incentive principle, and the one most often cited in a demurrage dispute. It says in its own first paragraph that its purpose is “to provide guidance about how the Commission will interpret 46 U.S.C. 41102(c) and § 545.4(d) in the context of demurrage and detention.”

Section 545.4(d) is element four. Reasonableness. So the whole incentive principle, with its particular applications for cargo availability, empty container return, notice of cargo availability and government inspections, is the interpretation of one of the five things that have to be true. It is the most useful of them, and it is not a shortcut past the other four.

For one invoice, the route is somewhere else

None of this means a single unfair charge has no remedy. It means the remedy is not this one.

The billing rules in 46 CFR part 541 operate per invoice and need no pattern proved. Section 541.5 is blunt about it: failure to include any of the required minimum information “eliminates any obligation of the billed party to pay the applicable charge”. Section 541.7(a) does the same for lateness: no invoice within thirty calendar days of the date the charge was last incurred, and the billed party is not required to pay. Those are checks against what the invoice has to carry, done one invoice at a time, and the charge complaint is the procedure built on them.

So the honest shape of it is two routes, used for different things:

  • One invoice, wrong on its face. The billing rules and the charge complaint. Fields, dates, the thirty-day window, and whether you are the right party to bill at all.
  • A carrier or terminal that does this as a matter of course. 41102(c), all five elements, reparations.

The second route is an evidence problem, and that is the point

Element (b) asks for a pattern and element (e) asks for proximate cause. Both are answered from records, not from recollection, and the records are per shipment: when the cargo became available, when and how notice reached you, when the empty could be returned, who was chased and on what day, what the invoice said at the time.

An import desk that keeps that per container has the makings of both elements. One that keeps it in a mailbox and a spreadsheet has neither, and will usually settle. Document packs routinely run about eight days late against free time on ordinary imports, and a week of demurrage on a single container has been reported at around US$12,000. That is roughly the point at which the difference between having the dates and remembering them stops being an administrative detail.

That is the unglamorous case for demurrage and detention software that keeps the dated record per shipment: not that it argues the law, but that it is the only thing standing between a desk and element (e).

What this entry is not

It is not legal advice and it is not a complete account of FMC practice. It is the text of one statute, the Commission’s own five-element interpretation of it, and the sentence in which the Commission says which element the incentive principle interprets. Everything above is quoted or cited; a reparations claim is run by people who do that for a living.

Questions traders ask

What is an unjust and unreasonable practice under 41102(c)?

The statute says a common carrier, marine terminal operator or ocean transportation intermediary "may not fail to establish, observe, and enforce just and reasonable regulations and practices relating to or connected with receiving, handling, storing, or delivering property." Demurrage and detention sit inside that wording because they are charges for the use of terminal space and containers, which is storing and delivering property.

What do you have to prove for a 41102(c) claim?

Five things, on the Commission's own interpretation at 46 CFR 545.4: that the respondent is an ocean common carrier, marine terminal operator or ocean transportation intermediary; that the claimed acts or omissions are occurring on a normal, customary and continuous basis; that the practice relates to receiving, handling, storing or delivering property; that it is unjust or unreasonable; and that it is the proximate cause of the claimed loss.

Can one unfair demurrage invoice be a 41102(c) violation?

On its own, no, and this is the element people miss. 46 CFR 545.4(b) requires the acts or omissions to be occurring on a normal, customary and continuous basis. A single invoice is an event, not a practice. For one invoice the route is the charge complaint and the billing rules, where a missing required field or a late invoice removes the obligation to pay without anyone proving a pattern.

Is the incentive principle the whole test?

No. 46 CFR 545.5 states its own purpose as providing guidance on how the Commission will interpret 46 U.S.C. 41102(c) and section 545.4(d) in the context of demurrage and detention. Section 545.4(d) is the fourth element, reasonableness. The incentive principle tells you how reasonableness will be judged; it does not supply the other four elements.

What does proximate cause mean here?

Element five, 46 CFR 545.4(e): the practice must be the proximate cause of the claimed loss. It is the element that turns a dispute into an evidence exercise, because it asks what the charge was actually caused by — the carrier's practice, or something at your own end. A desk that cannot show when the cargo became available, when notice arrived and when the empty could be returned is arguing the point from memory.

Sources

  1. 46 U.S.C. 41102(c), General prohibitions — Practices in Handling Property: "A common carrier, marine terminal operator, or ocean transportation intermediary may not fail to establish, observe, and enforce just and reasonable regulations and practices relating to or connected with receiving, handling, storing, or delivering property." · checked 2026-10-09
  2. 46 CFR 545.4, Interpretation of Shipping Act of 1984 — Unjust and unreasonable practices: 46 U.S.C. 41102(c) "is interpreted to require the following elements in order to establish a successful claim for reparations: (a) The respondent is an ocean common carrier, marine terminal operator, or ocean transportation intermediary; (b) The claimed acts or omissions of the regulated entity are occurring on a normal, customary, and continuous basis; (c) The practice or regulation relates to or is connected with receiving, handling, storing, or delivering property; (d) The practice or regulation is unjust or unreasonable; and (e) The practice or regulation is the proximate cause of the claimed loss." 83 FR 64480, 17 December 2018 · checked 2026-10-09
  3. 46 CFR 545.5(a), Purpose — "The purpose of this rule is to provide guidance about how the Commission will interpret 46 U.S.C. 41102(c) and § 545.4(d) in the context of demurrage and detention"; 545.5(c)(1) sets the incentive principle, under which the Commission "will consider the extent to which demurrage and detention are serving their intended primary purposes as financial incentives to promote freight fluidity", with particular applications at 545.5(c)(2) for cargo availability, empty container return, notice of cargo availability and government inspections. 85 FR 29665, 18 May 2020 · checked 2026-10-09
  4. 46 CFR 541.5, Failure to include required information — "Failure to include any of the required minimum information in this part in a demurrage or detention invoice eliminates any obligation of the billed party to pay the applicable charge"; 541.7(a) requires an invoice within 30 calendar days of the date the charge was last incurred, failing which "the billed party is not required to pay the charge". 89 FR 14362, 26 February 2024 · checked 2026-10-09
  5. Docket operational baseline, import–export desk
  6. Reported incident, import–export desk