9901.00.52
Ethyl tertiary-butyl ether (provided for in subheading 2909.19.18) and any mixture containing ethyl tertiary-butyl ether
Duty rates
Column 1 (General / MFN)
5.99¢/ liter
Column 2 (Non-NTR)
5.99¢/ liter
Column 1 (Special / FTA)
No change (A,E) Free (CA,IL, MX) See U.S. note 3(e) (CO,PE)
The rates above are statutory column rates. Trade remedies in Chapter 99 (Section 301, 232, IEEPA, reciprocal) and FTA preferences can change the duty owed on a given entry — see below.
Trade measures (Chapter 99)
9903.03.01
The duty provided in the applicable subheading + 10%
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Effective from February 24, 2026 through July 24, 2026
9903.03.02
The duty provided in the applicable subheading
Articles the product of any country that (1) were loaded onto a vessel at the port of loading and in transit on the final mode of transit prior to entry into the United States, before 12:01 a.m. eastern standard time on February 24, 2026; and (2) are entered for consumption, or withdrawn from warehouse for consumption, before 12:01 a.m. eastern standard time on February 28, 2026
Effective from February 24, 2026 through July 24, 2026
9903.03.03
The duty provided in the applicable subheading
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Effective from February 24, 2026 through July 24, 2026
9903.03.04
The duty provided in the applicable subheading
Articles the product of any country, as provided for in subdivision (aa)(iii) of U.S. note 2 to this subchapter
Effective from February 24, 2026 through July 24, 2026
9903.03.05
The duty provided in the applicable subheading
Articles of civil aircraft (all aircraft other than military aircraft); their engines, parts and components; their other parts, components and subassemblies; and ground flight simulators and their parts and components of any country, provided for in subdivision (aa)(iv) of U.S. note 2 to this subchapter
Effective from February 24, 2026 through July 24, 2026
9903.03.06
The duty provided in the applicable subheading
Articles of aluminum, of steel, or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; and semiconductor articles, of any country, as provided in subdivision (aa)(v) of U.S. note 2 to this subchapter
Effective from February 24, 2026 through July 24, 2026
9903.03.07
The duty provided in the applicable subheading
Articles the product of Canada, as provided for in subdivision (aa)(vi) of U.S. note 2 to this subchapter
Applies to origin: CA
Effective from February 24, 2026 through July 24, 2026
9903.03.08
The duty provided in the applicable subheading
Articles the product of Mexico, as provided for in subdivision (aa)(vii) of U.S. note 2 to this subchapter
Applies to origin: MX
Effective from February 24, 2026 through July 24, 2026
9903.03.09
The duty provided in the applicable subheading
Articles of textiles or apparel the product of Costa Rica, the Dominican Republic, El Salvador, Guatemala, Honduras or Nicaragua, as provided for in subdivision (aa)(viii) of U.S. note 2 to this subchapter
Applies to origin: CR, SV, GT, HN, NI, DO
Effective from February 24, 2026 through July 24, 2026
9903.03.10
The duty provided in the applicable subheading
Articles that are donations, by persons subject to the jurisdiction of the United States, such as food, clothing and medicine, intended to be used to relieve human suffering
Effective from February 24, 2026 through July 24, 2026
9903.03.11
The duty provided in the applicable subheading
Articles that are informational materials, including but not limited to publications, films, posters, phonograph records, photographs, microfilms, microfiche, tapes, compact disks, CD ROMs, artworks and news wire feeds
Applies to origin: IL
Effective from February 24, 2026 through July 24, 2026
Related CBP rulings
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Application for Further Review for Protest number 2305-17-100012; RB Logistics LLC; Reliquidation
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Application for Further Review of Protest 3501-14-150001; Applicability of subheading 9801.00.10; 19 C.F.R. § 123.21
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Internal Advice; Bona Fide Sale; Sale for Export
Internal Advice; Bona Fide Sale; Sale for Export
Application for Further Review of Protest Number 3004-10-100052; Notice of Redelivery
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Application for Further Review of Protest No. 3004-12-100028; Subheading 9801.00.20, HTSUS; 19 CFR § 10.108; Same Importer requirement
The protestant, Quad-Lock, is a Non-Resident Importer (“NRI”) located in Canada. It is the parent of a group of companies involved in the manufacture and sale of Quad-Lock insulated concrete form (“ICF”) wall systems. Other companies in the
Internal Advice Request; Transaction Value; Related Parties; 19 U.S.C. § 1401a(b)
The importer was the subject of an “Assist Audit Report,” number 831-04-AT1-AU-18625, dated June 14, 2005. In this case, your port believes the importer acted as a selling agent of its related parent. By contrast, counsel for the importer a
Other codes in heading 9901
Duty by origin country
The rate above is the statutory base. Total landed duty depends on origin — see the calculated rate for 9901.00.52 from each major US trading partner.
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