Cargo Retention Clauses in Charterparties: Legal Implications for Importers | RK Petro

What Is a Cargo Retention Clause?

A cargo retention clause (CRC) is a fixture provision found in tanker voyage charterparties that allocates responsibility for liquid cargo which cannot physically be stripped from a vessel's tanks after discharge is complete. Under a typical formulation, the owner warrants that its cargo pumps and stripping arrangements meet class and industry standards, while the charterer accepts that any quantity up to an agreed percentage of the Bill of Lading figure remaining on board after discharge shall be deemed delivered and paid for in full.

The clause exists because zero ROB is unachievable in liquid trades. Even modern Aframaxes and LR2s with efficient eductor stripping systems leave measurable clingage behind. The CRC converts that physical reality into a clear commercial allocation: below the agreed threshold, the loss belongs to the cargo side; above it, the owner must demonstrate genuine pump failure or performance shortfall.

Why Cargo Gets Left Behind: The Technical Reality

Clingage and Stripping Performance

Retention has two components. The first is clingage: the film of product adhering to internal surfaces, which no pump can recover. The second is operational ROB: cargo left because suction was lost while strippable liquid remained. Well-run operations distinguish the two through hourly pumping logs, ullage readings before and after discharge, and joint ROB surveys at both the load and discharge ports.

Viscosity, Pour Point, and Pumpability

Pumpability is governed by kinematic viscosity, measured in centistokes (cSt), and by pour point, the lowest temperature at which a cargo will still flow. Light sweet crudes move readily at ambient conditions. Heavy waxy crudes, high sulfur fuel oil grades such as RMG 380, and penetration-grade bitumen demand active heating throughout the voyage and discharge, typically maintained between 45 and 65 degrees Celsius for residual fuels, and between 150 and 180 degrees Celsius for bitumen. If cargo cools below its pour point mid-discharge, it can gel in the tank and become unrecoverable, triggering a retention dispute worth hundreds of thousands of dollars.

MARPOL Annex I adds a further layer: a vessel generally may not ballast or clean tanks ahead of schedule while pumpable ROB remains, so stranded cargo also creates scheduling and compliance pressure on the owner, sharpening the incentive to argue over whose fault the retention was.

Indicative Retention Thresholds by Cargo Type

Thresholds are negotiated cargo by cargo, but market practice clusters predictably around viscosity and handling temperature. The figures below are indicative planning benchmarks rather than fixed rules.

Note how exposure scales: a tenth of a percent sounds trivial until it is applied to a full parcel at current flat prices, then converted through freight, insurance, duties, and financing costs.

Legal Implications for Importers

Two Contracts, One Loss: Charterparty Versus Sale Terms

The central legal trap is privity mismatch. An importer buying CIF or CFR holds a sale contract in which risk passed to it at the load port, yet the retention clause lives in a charterparty it never signed, concluded between the owner and a head charterer who may be a trader. The trader defends the owner's claim, then passes the deduction downstream through invoice adjustments, quality and quantity letters, or simply prices it into future business. Importers chartering in vessels themselves on FOB purchases sit directly across the table from the owner, with no buffer.

Because the clause deems retained cargo delivered, courts and tribunals generally treat title and risk in the retained quantity as passing at completion of discharge. That characterization matters for letter-of-credit presentations, inventory accounting, and insurance notifications.

How the Claim Is Priced

Quantification turns on the pricing basis written into the clause. Common formulations reference the invoice price at the discharge port, the FOB price at the load port, or a replacement price at the destination market, sometimes with freight added and interest running from the claim date. A poorly drafted clause referencing an opaque index invites satellite litigation. Economically, the importer suffers a double hit: freight was paid on the full Bill of Lading quantity, and payment is then made again on the retained portion, lifting effective landed cost by the full retention percentage.

Demurrage, Laytime, and Stripping Operations

Retention disputes rarely arrive alone; they arrive attached to demurrage. Hours spent stripping tanks, waiting for shore lines to be connected, or reheating cooled cargo all consume laytime unless the fixture expressly excludes them. A "free pumpable" style clause, under which any time lost after the pumps are ready is not counted against the vessel, interacts directly with retention exposure. Tribunals scrutinize whether pumping stopped because of shore reception constraints, which favor the charterer, or because of vessel pump limitations, which favor the owner.

Evidence, Surveys, and Burden of Proof

In practice, the party with the better paper wins. Owners rely on hourly pumping logs, pump curve data, and class records to prove rated performance. Charterers and importers counter with joint ROB surveys, independent draft surveys, ullage reports at two ports, and superintendent attendance. An importer who fails to appoint a surveyor at the discharge port, or who signs off a Statement of Facts without reservation, hands the owner a powerful evidentiary advantage regardless of the underlying merits.

Governing Law and Dispute Resolution

Most tanker fixtures carry English law with London Maritime Arbitrators Association (LMAA) terms, alongside growing use of the Singapore Chamber of Maritime Arbitration (SCMA) and, for US trades, the Society of Maritime Arbitrators in New York. The economics are sobering: a retention claim on a mid-size gasoil parcel might be worth $60,000 to $90,000, while contested arbitration costs can approach or exceed the amount in dispute. This asymmetry drives early settlement, which makes precise drafting at the negotiation stage far more valuable than clever advocacy afterward.

Practical Risk Mitigation for Importers

1. Cap the percentage at negotiation. Tie the retention threshold to documented pump performance for the specific vessel class and cargo grade rather than accepting boilerplate figures.
2. Mandate the paper trail. Require hourly pumping logs, joint ROB surveys at load and discharge ports, and reserved Statements of Fact as condition precedents to any deemed-delivery presumption.
3. Align the sale contract with the fixture. Ensure deemed quantity, pricing basis for retention claims, and inspection rights read identically across charterparty, sales contract, and letter of credit terms.
4. Fix realistic heating parameters. State discharge temperatures explicitly in degrees Celsius, matched to the grade's pour point and viscosity profile, with consequences allocated if either side breaches them.
5. Price the exposure into landed cost. Model expected retention uplift, freight on the full B/L quantity, and historical claim rates per trade lane into procurement budgets.
6. Appoint surveyors early. Independent attendance at both ports is inexpensive relative to a single contested claim and materially strengthens settlement leverage.