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The Tariff Act of 1930 is the overarching US statutory framework for customs administration, import classification, and trade-remedy enforcement. It creates four principal operative authorities:
Title I — Customs Revenue, Classification, and Valuation (19 U.S.C. §§1202+). Title I established the tariff schedule that became the basis for US customs-revenue collection and, after successive GATT and WTO renegotiations, evolved into the Harmonized Tariff Schedule of the United States (HTSUS). The HTSUS — implemented under the Omnibus Trade and Competitiveness Act of 1988 and administered jointly by the US International Trade Commission and Customs and Border Protection — remains the binding tariff- classification framework for all US imports. Every customs duty, tariff preference, and tariff-rate quota operates through the HTSUS architecture rooted in Title I of the 1930 Act.
Title VII — Antidumping and Countervailing Duty Proceedings (19 U.S.C. §§1671–1677n). Title VII (added by the Trade Agreements Act of 1979 implementing the GATT Tokyo Round Antidumping and Subsidies Codes, and substantially revised by the Uruguay Round Agreements Act of 1994 / URAA implementing the WTO Antidumping and SCM Agreements) establishes the US AD/CVD trade-remedy regime:
less than fair value (LTFV / "dumping"); USITC determines whether the domestic industry is materially injured or threatened by reason of the dumped imports. An affirmative determination from both agencies results in an antidumping duty order imposing a case-specific ad-valorem margin as an additional customs duty on covered imports. Hundreds of active AD orders are maintained at any time, predominantly targeting Chinese, Vietnamese, Korean, Indian, and Mexican products across steel, aluminum, solar, chemicals, furniture, textiles, and manufactured goods.
specific subsidies to subject-good producers; USITC determines material injury. Affirmative findings result in CVD orders imposing additional duty equal to the net countervailable subsidy rate. CVD proceedings run in parallel with or independently of AD proceedings on the same subject merchandise.
USITC each determine in a sunset review that revocation would likely lead to continuation or recurrence of dumping/subsidies and material injury. Most major orders survive multiple sunset reviews; some (e.g., the China solar AD/CVD constellation) have been in force for over a decade.
processing is designed to circumvent existing orders and extend AD/CVD coverage accordingly. A major enforcement mechanism against supply-chain rerouting through Vietnam, Thailand, Malaysia, Cambodia, and Mexico to evade China-origin duty orders.
Section 337 — Unfair Import Practices and IP-Exclusion Orders (19 U.S.C. §1337). Section 337 authorizes the USITC to investigate unfair acts in the importation or sale of articles — predominantly patent, trademark, trade-secret, and copyright infringement claims — and, upon finding a violation, to issue exclusion orders (barring the infringing imports at the border) and/or cease-and-desist orders. Section 337 investigations run on a strict 16-month statutory deadline (shorter than federal-court patent litigation) and do not require the complainant to demonstrate material injury to a domestic industry. Roughly 50–80 investigations are filed annually, predominantly by US technology companies against Chinese, Korean, Taiwanese, Indian, and other offshore electronics, semiconductor, biopharmaceutical, and consumer-product manufacturers.
Section 201 — Safeguard (Global) Investigations (19 U.S.C. §§2251–2254, cross-reference with Trade Act 1974). Section 201 of the Trade Act of 1974 recodified and modernised the safeguard authority originally in the Tariff Act of 1930, authorizing USITC investigations and presidential proclamation of temporary tariffs or quotas to remedy serious injury from surging imports, irrespective of unfair-trade conduct. Invocations directly relevant to the IPTM register include the 2018 washing- machine and solar-panel safeguards (§201 petitions; Trump), maintained and partially revised through 2024.
original Smoot-Hawley tariff schedules; US Tariff Commission empowered; basic customs framework
GATT Tokyo Round Antidumping and Subsidies Codes; established the AD/CVD two-agency framework
provisions; refined Section 337 domestic-industry definition
provisions; aligned HTSUS with Harmonized System (effective 1 Jan 1989)
to align with WTO Antidumping Agreement and SCM Agreement; established the five-year sunset-review mechanism; revised the USITC injury standard
AD/CVD enforcement, circumvention procedures, and CBP targeting; added evasion-investigation authority (now 19 U.S.C. §1517) that is widely used against Chinese-origin product rerouting
non-market-economy (NME) treatment, and particular-market-situation (PMS) determinations
Implementing instruments directly filed in the IPTM register that derive authority from this statute:
(FR Doc. 2024-29245) tightening AD/CVD cash-deposit, scope-determination, NME, and PMS procedures under 19 CFR Part 351; effective 15 Jan 2025 — direct Title VII implementing instrument
(FR Doc. 2024-30257) updating the electronic-filing annexes (forms, certifications, service-list templates) for AD/CVD proceedings; direct Title VII implementing instrument
Additional cross-references:
maintained at USITC — derives direct authority from Title VII of this Act
imports issued by USITC derives authority from §337 of this Act
IN Customs Tariff Act 1975 + CN Foreign Trade Law 1994 + JP Customs Tariff Act 1910 + CA SIMA 1984 + AU Customs Act 1901
existing AD/CVD orders on the same merchandise — legal briefs in the CAFC and CIT explore whether stacking of AD/CVD margins plus IEEPA tariffs is consistent with WTO obligations
Southeast Asia and Mexico: ongoing Commerce investigations with high IPTM-register relevance
a substitute trade-war instrument if tariff tools are constrained by WTO dispute-settlement rulings