When a “Set” Is Actually a Scheme: GRI 3(b), Classification Fraud, and the False Claims Act
The rules that govern how imported goods are classified — the General Rules of Interpretation — are legally binding and hierarchical. When an importer deliberately misapplies them to make a high-duty product disappear into a low-duty classification, the result is a false statement on every customs entry. GRI 3(b), which governs how “sets” of goods are classified, is particularly susceptible to this kind of manipulation, and the consequences under the False Claims Act may be significant.
Classification fraud is the oldest form of customs evasion. What is less commonly discussed — and less commonly litigated — is classification fraud that works not by falsely describing a product, but by technically correct application of a classification rule in a way that produces a result the rule was never intended to support. General Rule of Interpretation 3(b), which governs the classification of “sets” of goods put up for retail sale, is a particularly productive area for this kind of analysis. A company that understands how GRI 3(b) works can, in theory, bundle a high-duty product with a low-duty product, declare the combination a “set,” and argue that the low-duty product gives the set its “essential character” — thereby paying little or nothing on the high-duty item.
Whether a given application of this theory rises to the level of a knowing false claim under the FCA will depend on the facts. But the framework for that analysis exists, CBP has addressed the evasion risk directly, and employees who recognize the pattern have a legal avenue to act.
The General Rules of Interpretation: A Brief Primer
Every product imported into the United States must be assigned a classification code under the Harmonized Tariff Schedule of the United States (HTSUS). That code determines the applicable duty rate, whether antidumping or countervailing duties apply, and a range of other legal consequences. Classification is not optional or discretionary — importers are legally required to exercise “reasonable care” in classifying their goods correctly, and knowingly filing an entry with an incorrect classification is a false statement to the United States government.
The HTSUS classification system is governed by six General Rules of Interpretation, applied in strict hierarchical order. GRI 1 provides that classification is determined first by the terms of the headings and relevant notes. If GRI 1 cannot resolve the question, GRI 2 addresses incomplete, unfinished, or mixed goods. GRI 3 applies when goods are prima facie classifiable under two or more headings — it requires working through GRI 3(a) (most specific description), then GRI 3(b) (essential character), then GRI 3(c) (last in numerical order). GRI 4, GRI 5, and GRI 6 address remaining cases.
The GRIs have binding legal force. CBP and the courts apply them in resolving classification disputes, and the HTSUS Explanatory Notes provide official guidance on their interpretation. When an importer files an entry summary with a classification that a reasonably informed customs professional would know to be wrong under the GRIs, the entry contains a false statement. If that false statement is knowing and material — as it is whenever it results in underpayment of duties — it is actionable under the False Claims Act.
The Linde GmbH case, which settled for $22.28 million in 2020, is an instructive example of GRI-based misclassification leading to FCA liability. Among other violations, Linde was alleged to have declared assembled industrial equipment as unassembled specifically to obtain a lower classification — a direct manipulation of GRI 2(a), which governs the classification of unassembled goods. The principle that deliberate GRI manipulation can generate FCA exposure is, accordingly, not merely theoretical.
GRI 3(b) and the Classification of Sets
GRI 3(b) governs “mixtures, composite goods consisting of different materials or made up of different components, and goods put up in sets for retail sale.” When goods meet this description and cannot be resolved under GRI 3(a), they are classified as if they consisted of the component that gives the whole its “essential character.”
For a grouping of goods to qualify as a “set” under GRI 3(b), CBP’s Informed Compliance Publication on the Classification of Sets establishes that three requirements must be met: the goods must consist of at least two different articles classifiable in different headings; they must be put together to meet a particular need or carry out a specific activity; and they must be put up in a manner suitable for sale directly to end users without repacking. All three conditions are required. A grouping of unrelated products assembled into a box and sold together does not become a set merely because it is packaged for retail sale.
When the three criteria are satisfied, the entire set is classified under the heading that reflects its essential character. Essential character is not defined in the GRIs, but CBP and the courts have consistently looked to factors including the nature of the components, their relative bulk, quantity, weight, and value, and the role each component plays in the actual use of the goods. In practical terms, the question is: what makes this thing what it is?
CBP has addressed this question in hundreds of ruling letters, and the answers are instructive. In N329453 (December 2022), CBP classified an outdoor survival gift set — combining an axe-saw, a match kit, a poncho, a blanket, and other items — under the heading for handsaws, because the axe-saw was found to provide the essential character of both the composite tool and the overall set. In NY N323340 (January 2022), CBP classified a fish-smoking starter kit under the heading for articles of wood, because the wooden smoking rack was the predominant and indispensable component by value and function. In N269396, CBP classified a drone with accessories as a set and assigned classification based on the drone itself, which plainly provided the essential character.
These rulings illustrate a consistent principle: the essential character determination is real and fact-specific, and the component that provides it does not always yield a lower duty rate. When the essential character component carries a high duty, the whole set carries that duty.
The Section 232 Guidance: CBP Addresses the Evasion Risk Directly
CBP’s own guidance on Section 232 tariffs and sets confirms that the agency is alert to the specific evasion risk that GRI 3(b) presents. In its Section 232 Frequently Asked Questions, CBP states directly that when importing goods in sets for retail sale under GRI 3, if the product that imparts the essential character to the set is subject to Section 232 duties, then those duties apply to the entire set at the full ad valorem rate.
The guidance goes further, establishing specific entry summary line-item procedures for sets containing Section 232 articles. CBP instructs that the Article Set Header — the line item reflecting the essential character determination — must carry the correct classification for the essential character component, and that any applicable Chapter 99 Section 232 classification must be reported on the same line. This is not a technicality. It reflects CBP’s explicit awareness that set classification can be manipulated to move high-duty steel or aluminum articles into entries that appear, on their face, to reflect a lower-duty classification.
An importer who understands this guidance — who has reviewed the Section 232 FAQ, perhaps been advised by a customs broker familiar with it, or who has received a CBP Form 28 inquiry touching on set classification — and who continues to declare sets in a manner that causes Section 232 or Section 301 duties to disappear, has almost certainly crossed the line from classification error into knowing false statement.
Hypothetical Fact Patterns That May Be Actionable
The following hypothetical scenarios illustrate how GRI 3(b) set manipulation might generate False Claims Act liability. These are illustrative; whether any specific situation is actionable depends on the facts, the documentary record, and the nature of the importer’s internal decision-making. An attorney with customs classification expertise would need to evaluate the application of the GRIs to any given set of facts, and a pattern of CBP rulings on similar goods can provide powerful support for the position that the correct classification was knowable. Trying to imagine real-world scenarios in which the GRIs could be misused as a duty-avoidance scheme is not easy, so please understand these are only hypothetical—but I do think illustrations are important for these concepts.
Power tool with steel cutting attachments bundled as a retail kit. A Chinese manufacturer produces a corded angle grinder (heading 8467, dutiable at 0% but subject to Section 301 duties at 25%) and a set of steel grinding discs (heading 7326, subject to both Section 301 and Section 232 duties). The importer packages them together in a retail box and declares the combination as a single set, classifying the whole under heading 8467 based on the argument that the grinder provides the essential character. The grinding discs — carrying Section 232 liability — are not separately reported. The entry summary reflects none of the Section 232 exposure. If the discs are more than de minimis in value and CBP ruling precedent on similar goods would support their separate reporting, this classification may be a knowing false claim on every affected entry. An employee in the product line, procurement, or compliance function who knows that Section 232 exposure is being eliminated through this bundling decision may have a viable qui tam claim.
Industrial maintenance kit combining lubricants and steel fittings. A company imports a maintenance kit packaged for sale to industrial customers, combining tubes of specialty lubricant (heading 3403, duty-free) with steel pipe fittings (heading 7307, subject to Section 232 at 25% and potentially Section 301 as well). The importer classifies the kit under heading 3403 — the lubricant — on the theory that the lubricant is the reason a customer buys the kit and therefore provides the essential character. If the fittings represent the majority of the kit’s value and are the physically substantial component, a CBP essential character analysis would likely reject this classification. Filing entries on this basis, particularly after a customs broker or compliance officer has flagged the issue, may constitute knowing false statements.
Consumer electronics set with a high-value carrying case. A company imports a set consisting of a rugged carrying case (heading 4202, subject to Section 301 tariffs at 7.5%) and a small electronic device (heading 8543, duty-free). The case is substantially more valuable than the device — it is, in fact, the primary reason a customer purchases the set. The importer nevertheless classifies the whole set under heading 8543 — the electronic component — arguing that the electronics provide the essential character because the product is marketed as a “tech set.” This argument inverts the standard: where bulk, value, and function all point to the case as the essential character component, classifying the set under a lower-duty heading on the basis of marketing language may not survive scrutiny and may not be a good-faith classification.
Promotional gift set where the premium component carries high duties. A retailer imports holiday gift sets from China, each containing a branded stainless steel tumbler (heading 7323, subject to Section 301 at 25%) and a small packet of tea (heading 0902, duty-free at a fraction of the set’s value). The tumbler accounts for 90 percent of the value of the set, is the reason for the retail price, and is what the consumer is purchasing. The importer classifies the entire set under heading 0902 — the tea — on the theory that the set is a “tea gift set” and that the tea provides the specific activity. CBP ruling precedent on similar sets consistently holds that the item providing the dominant value and function controls the essential character determination. Classifying hundreds of these entries under the tea heading while the stainless steel tumbler’s Section 301 exposure goes unreported may be a knowable, systematic false claim.
What Employees Should Watch For
The people most likely to recognize GRI 3(b) manipulation are those involved in product development, customs compliance, trade finance, and communications with customs brokers. Specific red flags include: internal discussions in which the primary purpose of bundling two products is to achieve a lower duty classification rather than to serve a customer need; instructions to declare a set under a particular classification heading despite broker advice that the essential character determination points elsewhere; classification decisions made without any documented GRI analysis; and entries that consistently assign sets a classification that eliminates Section 301 or Section 232 exposure that would apply if the high-duty component were entered alone.
Written communications are particularly significant in this context. An internal email chain debating whether a set “counts” as a set, or whether the low-duty item “gives the set its essential character,” followed by a decision to proceed with the favorable classification despite contrary analysis, is a strong evidentiary foundation for a knowing false claim argument. The same is true of communications with customs brokers in which the broker flags the issue and is overruled.
Speaking with an Attorney
The False Claims Act’s qui tam provisions allow private individuals with original knowledge of customs classification fraud to file suit on behalf of the United States and share in any recovery — typically 15 to 30 percent of what the government recovers. One of the distinctive features of a GRI 3(b) case is that the legal standard for the correct classification is, in many instances, well-established through CBP ruling letters. A skilled customs fraud attorney can use those rulings to demonstrate that the correct classification was knowable, that the importer’s classification was inconsistent with it, and that the departure was not an honest mistake. If you have observed a pattern of set bundling that appears designed to eliminate high-duty exposure, contact us for a confidential consultation.
