The incentive principle and gate closures: disputing charges you could not avoid

Where the incentive principle comes from

Demurrage and detention exist to keep boxes moving. Demurrage motivates the cargo owner to take the full container off the terminal; detention motivates the return of the empty. When a charge accrues while the cargo owner is doing everything possible and the terminal or carrier is the bottleneck, the charge motivates nothing. It just transfers money.

The FMC wrote that idea into its interpretive rule at 46 CFR § 545.5, adopted in May 2020 after the Commission's Fact Finding 28 investigation into D&D practices. The rule explains how the Commission will apply 46 U.S.C. § 41102(c), which requires common carriers, MTOs and ocean transportation intermediaries to establish, observe and enforce just and reasonable regulations and practices related to receiving, handling, storing or delivering property. Section 545.5(c)(1) states the test: the Commission will consider the extent to which demurrage and detention are serving their intended primary purposes as financial incentives to promote freight fluidity.

OSRA 2022 then gave the principle teeth in billing. 46 U.S.C. § 41310 places the burden on the common carrier to establish the reasonableness of D&D charges under § 545.5 when a charge complaint is submitted.

What the rule text covers, and what it does not

Section 545.5(c)(2) names four particular applications. On cargo availability, the Commission may consider the extent to which demurrage practices relate demurrage or free time to cargo availability for retrieval. On empty container return, absent extenuating circumstances, detention that does not serve its incentive purpose, such as when empty containers cannot be returned, is likely to be found unreasonable. On notice, the Commission may consider how cargo availability is communicated. On government inspections, it may consider whether charges serve their purpose and any extenuating circumstances.

The rule text does not mention gate closures or appointment systems by name. Those situations are argued through availability: a container in a terminal with no open import appointments, or behind a closed gate, is not available for retrieval in any practical sense. Paragraph (f) also confirms the Commission may consider factors, arguments and evidence beyond those listed. Frame the dispute honestly: cite (c)(1) and (c)(2)(i), describe the facts, and let the evidence carry the argument rather than claiming the rule says more than it does.

Situations that fit the principle

Across the disputes we prepare, the same handful of fact patterns recur. Each one is a day when the cargo interest could not act on the incentive the charge was supposed to create.

• Terminal gate closed on a scheduled working day (weather, labor action, system outage, holiday not reflected in free time)
• Gate open but no import appointments available in the terminal's appointment system for the container's yard block
• Container unavailable for pickup due to a carrier freight hold or terminal hold the cargo owner had already cleared
• Empty return refused: the carrier's designated return location not accepting that size or type, or a dual-transaction requirement with no matching export load
• Availability notice sent late, so free time was consumed before the cargo owner knew the box was pickable

Evidence that holds up

The incentive argument lives or dies on proof that the obstacle existed on the specific days billed. Statements like "the port was congested that week" carry little weight. Timestamped records of the actual terminal do.

For appointment shortages, that means screen captures of the appointment system showing no available slots for the relevant date, terminal and transaction type, with the capture time visible, ideally several times across the day. For gate closures, it means the terminal's posted gate schedule or closure notice, and the carrier or terminal advisory if there was one. For holds, it means the hold history from the terminal and the evidence that you cleared your side (freight paid, customs released). For empty returns, it means the terminal's empty receiving notice and any rejected ingate attempt, including the trucker's trouble ticket or gate receipt.

Keep the trucker's record too. A drayage dispatcher's log showing a scheduled pickup that was cancelled because the terminal closed a yard block is the kind of independent corroboration that makes a request easy to grant.

Worked example: two blocked days on three containers

Brightwater Appliance imports through an East Coast terminal. Three 40-foot containers had 4 days of free time ending Thursday, March 12, 2026. Its trucker attempted to book import appointments for Wednesday, Thursday and Friday. The terminal's appointment system showed no available import slots for those boxes' yard block on Thursday or Friday; Brightwater's team captured the screen at 07:10, 11:30 and 15:45 on both days. Appointments opened Monday, March 16, and all three boxes outgated that day.

The MTO's invoice bills demurrage March 13 through March 16, 4 days at $250 per container, for a total of 3 x 4 x $250 = $3,000.

The dispute isolates the blocked days. Thursday, March 12 fell inside free time, so no charge accrued, but it is evidence that the shortage began before free time ended. Friday, March 13 was billed while no appointments existed. Saturday and Sunday the terminal was closed to import deliveries per its posted gate schedule. Monday, March 16 was the first day an appointment was available and was used. Brightwater disputes March 13, 14 and 15: 3 x 3 x $250 = $2,250, and accepts the Monday charge of 3 x $250 = $750. The packet cites § 545.5(c)(1) and (c)(2)(i), the § 541.6(e)(2) certification, the timestamped captures and the gate schedule.

When the argument is weaker

Not every slow week is an incentive principle case. If appointments were available at a different time of day and the trucker chose not to take them, the charge did what it was meant to do. If the delay came from the cargo owner's own warehouse being full, or from a broker filing late, the obstacle was on the billed party's side.

Government inspections sit in between. Section 545.5(c)(2)(iv) makes them a case-by-case question, so a two-day customs exam is not an automatic waiver. Sort the days honestly before sending. A request that disputes every day on the invoice reads as a negotiating tactic; one that disputes three and accepts one reads as a reconciliation.

Building it into the workflow

Timing matters as much as evidence. Under § 541.8(a), the billed party has at least 30 calendar days from invoice issuance to request mitigation, refund or waiver, and under § 541.8(b) the billing party must attempt to resolve the request within 30 calendar days of receipt unless both sides agree otherwise. An incentive principle request that arrives on day 29 with a complete evidence set is better than one sent on day 5 with a promise to follow up. If the request is denied without a substantive explanation, the denial and your packet become the core of any later charge complaint, so write the first request as if the FMC will read it.

Milestone & Gate Tracking captures terminal availability, appointment and gate status as part of normal tracking, so the timestamped record exists before anyone knows they will need it. When the invoice arrives, it lines the billed days up against the blocked days and pre-fills the dispute. Carrier Scorecards then show, over time, which carriers and terminals credit these requests and how quickly.

ATAHSKIA prepares the evidence and the packet; the decision to send it, and any escalation to a charge complaint under 46 U.S.C. § 41310, stays with the billed party.