By Andy Gaber, Founder · Published August 13, 2026 · Last updated August 13, 2026
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31 terms an importer tracking Section 232 exposure runs into sooner or later — in a Federal Register notice, a CBP ruling, or a customs broker's classification memo. Each definition is cited to the actual regulation, statute, or federal agency page that governs it. This is not legal or customs classification advice; see our editorial policy.
The provision of the Trade Expansion Act of 1962 (19 U.S.C. §1862) authorizing the President to adjust imports, including through tariffs, found to threaten national security following a Commerce Department investigation. Section 232 is the legal basis for the steel and aluminum tariffs central to TariffWatch's coverage, distinct from the more commonly invoked Section 301 authority. The two are not interchangeable.
The numeric classification code assigned to every imported product under the U.S. Harmonized Tariff Schedule, determining both the general duty rate and whether product-specific tariff actions like Section 232 apply. Whether a specific HTS code falls inside a Section 232 derivative-article expansion is a classification question layered on top of the code's baseline duty treatment. Get the code wrong and everything downstream follows it.
The executive-branch agency responsible for developing and coordinating U.S. international trade policy, including negotiating trade agreements and administering Section 301 tariff actions. USTR and the Commerce Department's Bureau of Industry and Security have distinct but overlapping roles in different tariff authorities, USTR under Section 301, BIS under Section 232. Two agencies, two dockets.
The Commerce Department bureau responsible for administering Section 232 national-security tariff investigations and export controls (EAR). BIS published Federal Register notice 2026-15961 on 2026-08-06, proposing the derivative steel and aluminum articles central to the current comment window. That notice is the one this glossary keeps returning to.
An independent federal agency. It investigates and rules on antidumping and countervailing duty petitions, and conducts broader trade-impact studies, distinct from BIS's Section 232 national-security role and USTR's Section 301 role. Import compliance discussions sometimes conflate these three agencies' roles; each has separate statutory authority.
The regulations, administered by BIS, controlling the export of dual-use goods and technology (items with both civilian and military applications) from the United States. EAR governs exports. Section 232 tariffs govern imports. Related trade-security tools, administered by the same bureau, addressing opposite directions of trade flow.
The State Department-administered regulations controlling the export of defense articles and services specifically, as opposed to BIS's broader dual-use EAR controls. ITAR sits entirely outside Section 232's scope. It gets mentioned alongside it anyway, in general trade-compliance discussion, because both concern national-security-driven trade restrictions.
A downstream product made from a Section 232-covered material (like steel or aluminum) that gets brought within the tariff's scope even though the article itself is not the raw covered material. The 2026-08-06 Federal Register notice proposes 14 additional derivative steel and aluminum articles beyond the existing coverage, which is the specific expansion TariffWatch's exposure checker evaluates.
The formal legal instrument through which the President implements a Section 232 tariff action following a Commerce Department investigation and recommendation. The existing Section 232 tariff structure, a 50% rate on aluminum, most steel, and most copper articles and derivatives, took its current form through a Presidential Proclamation modification effective 2026-06-01.
The official published notice through which federal agencies announce proposed and final rules, including tariff actions. Notice 2026-15961, published 2026-08-06, is the notice proposing the current round of Section 232 derivative-article additions.
The window during which the public may submit formal comments on a proposed federal rule before it is finalized, a requirement under the Administrative Procedure Act for most rulemaking. The comment period for notice 2026-15961 opened 2026-08-04 and closes 2026-08-27.
The organized public record of a specific rulemaking proceeding, including the proposed rule and all submitted public comments, hosted at regulations.gov. As of an Aug 8, 2026 API check, the docket for this Section 232 proposal had not yet been indexed for direct comment submission via API, see https://www.regulations.gov/docket/BIS-2026-0331 for the current docket status.
A tariff calculated as a percentage of a good's declared value, as opposed to a specific tariff (a flat amount per unit or weight). The Section 232 steel and aluminum tariffs are ad valorem, the 50% rate applies as a percentage of the covered article's value, not a fixed per-ton charge.
A trade mechanism applying a lower tariff rate to a set quantity of imports and a higher rate to anything above that quantity, distinct from a flat ad valorem tariff applied uniformly to all imports of a product regardless of volume.
A separate tariff authority from Section 232, under the Trade Act of 1974, allowing USTR to impose tariffs in response to unfair foreign trade practices (rather than Section 232's national-security justification). Section 301 and Section 232 tariffs can both apply to the same product simultaneously, from two entirely separate legal authorities and rulemaking processes. USTR maintains its own public tracker of active Section 301 actions, separate from BIS's Section 232 docket, and an importer researching total tariff exposure on a given product needs to check both independently rather than assuming one authority's determination covers the other.
A duty imposed when a foreign producer is found to be selling a product in the U.S. below its fair market value ("dumping"), following a joint Commerce Department and ITC investigation. AD duties are product- and country-specific, and are calculated independently of any applicable Section 232 tariff on the same product.
A duty imposed to offset a foreign government subsidy found to unfairly benefit a product's exporters, determined through a process parallel to antidumping investigations. Like AD duties, CVD is calculated independently of and can stack with a Section 232 tariff on the same imported product.
A trade-policy provision (19 U.S.C. §1321) allowing shipments below a set value threshold to enter with reduced duties and formalities. De minimis treatment has been the subject of significant federal policy change and debate, particularly regarding low-value e-commerce imports from certain countries, separate from Section 232's scope.
The country where a product is determined, under customs rules, to have originated for tariff purposes, not necessarily the country it shipped from most recently. Country-of-origin determination is central to Section 232 compliance because the tariff's applicability and any country-specific exclusions depend on getting this determination right.
The legal test CBP uses to determine a product's country of origin when manufacturing spans multiple countries, whether processing in a given country changed the product's name, character, or use enough to be considered the country of origin. Substantial transformation questions are common in Section 232 disputes involving multi-country supply chains.
A binding classification or origin determination CBP issues in response to an importer's formal ruling request, searchable in CBP's Customs Rulings Online Search System (CROSS). A CBP ruling on a specific product's classification or origin is the most authoritative way to resolve uncertainty before a shipment, more reliable than general guidance alone.
A formal request an importer submits to CBP for an official, legally binding determination on a product's classification, valuation, or origin before importing it, providing legal certainty that general guidance cannot. For a product whose Section 232 derivative-article status is genuinely ambiguous, a binding ruling request is the definitive way to resolve it.
The complete, official U.S. tariff classification schedule maintained by the ITC, extending the international 6-digit Harmonized System to 10 digits for U.S.-specific duty and regulatory detail. Section 232 coverage is defined by specific HTSUS subheadings, which is why precise classification matters so much for exposure determination.
A special chapter of the HTSUS used to layer temporary trade-remedy tariffs, including Section 232 and Section 301 duties, on top of a product's normal HTSUS classification, without changing the underlying classification itself. A Section 232-covered product carries both its normal HTSUS code and an additional Chapter 99 code reflecting the tariff action.
A formal process, when available, allowing an importer to request that a specific product be excluded from a Section 232 or Section 301 tariff, typically on grounds like the product not being available from a domestic source. Exclusion availability and criteria vary by tariff action and change over time as proclamations are modified.
The Commerce Department investigation process required before a Section 232 tariff action, examining whether a given product's import volume threatens U.S. national security, the statutory predicate for any resulting Presidential Proclamation.
The general category of manufactured goods (certain appliances, furniture, vehicle parts, and similar) made substantially from steel or aluminum, brought within Section 232's tariff scope through specific derivative-article designations rather than being raw steel or aluminum themselves, the exact category the current comment window proposes expanding.
A tracking number BIS assigns to a specific rulemaking action for cross-referencing across the regulatory system. Comments on the current Section 232 derivative-article proposal must reference XRIN 0694-XC166 per the Federal Register notice's own instructions.
The federal department housing BIS, which conducts Section 232 national-security investigations and administers the resulting tariff actions and exclusion processes. DOC's role in Section 232 is distinct from USTR's Section 301 role and the ITC's antidumping/countervailing duty role, though all four intersect in general trade-compliance work.
The multilateral trade agreement, predecessor to the WTO, whose Article XXI national-security exception is the international-law basis frequently cited to justify Section 232-style tariff actions under global trade rules.
The international body overseeing global trade rules and dispute resolution, within whose framework Section 232 tariff actions have been the subject of formal disputes from trading partners. WTO proceedings operate on a separate timeline from U.S. domestic Federal Register rulemaking and do not directly affect an importer's immediate domestic compliance obligations.
No. It is a plain-English reference to publicly documented trade-law terminology, cited to the regulation or statute itself where one exists. It is not a substitute for advice from a licensed customs broker or trade attorney, and compliance decisions remain the responsibility of the importer.
Because Section 232 tariffs sit on top of the broader U.S. tariff and trade-compliance system, understanding a Section 232 derivative-article determination requires understanding HTS classification, the Federal Register rulemaking process, and CBP entry procedures that apply more broadly across trade law.
Yes, several entries (Derivative Article, Public Comment Period, Docket) are written with direct reference to Federal Register notice 2026-15961 and its comment window closing 2026-08-27, since that is the active regulatory event TariffWatch is built around.
TariffWatch is a data and workflow tool that estimates Section 232 tariff exposure from publicly available Federal Register, USITC, and CBP data. TariffWatch is NOT a licensed customs broker under 19 CFR 111, NOT a filer of record, and NOT a legal-advice service. This is not customs classification advice. Compliance decisions remain the responsibility of the importer and their customs broker or trade attorney. TariffWatch does not guarantee that any classification, exposure estimate, or comment letter will be accepted by CBP, BIS, or Commerce.
TariffWatch is not affiliated with the U.S. Department of Commerce, the Bureau of Industry and Security (BIS), U.S. Customs and Border Protection (CBP), or the U.S. International Trade Commission (USITC).