Topic
Section 301 tariffs: every CBP message
Section 301 of the Trade Act of 1974 lets the U.S. Trade Representative act against foreign practices found to be unreasonable or discriminatory and to burden U.S. commerce. It is best known for the tariffs on goods from China imposed since 2018. It has since been used for fees on vessels and, in July 2026, for forced labor duties on imports from 60 economies.
CBP’s CSMS messages on Section 301 cover the Chapter 99 numbers to report, product exclusions and their extensions, rate changes, and how new actions interact with other duties.
68 CSMS messages since January 2021 · 43 needed action · latest Oct 22, 2026 · 9 key trade actions
On the trade timeline
Key trade actionsnewest first
Section 301 forced labor duties of 10% to 12.5% on imports from 60 economies imposed by USTR notice
Section 301 duties of 25% on products of Brazil imposed by USTR notice (91 FR 45516)
Section 301 fees on vessels imposed by USTR notice in the maritime, logistics, and shipbuilding investigation
Section 301 duties on tungsten, wafers, and polysilicon from China modified by USTR notice (89 FR 101682)
Section 301 duties on products of China modified by USTR notice after four-year review (89 FR 76581)
Pause of Section 301 large civil aircraft duties on EU and UK products extended for five years by USTR notice (86 FR 36313)
Section 301 large civil aircraft duties on products of the European Union paused by USTR notice (86 FR 13961)
Section 301 large civil aircraft duties on products of the United Kingdom paused by USTR notice (86 FR 14513)
Section 301 duties on aircraft parts and wine from France and Germany modified by USTR notice (86 FR 674)
Every CSMS message on Section 30168
2026 · 9
CSMS #70261629 · Oct 22, 2026
UPDATED GUIDANCE: Section 301 China Conforming Amendment
Action requiredTariffHigh urgencyCSMS #69990649 · Sep 22, 2026
Section 301 China Conforming Amendment
Action requiredTariffHigh urgencyCSMS #69567203 · Aug 18, 2026
Notice of Update to Drawback Error Dictionary Validations for FD07
System UpdateLow urgencyCSMS #69535943 · Aug 14, 2026
Notice of Update to Drawback Error Dictionary Validations for FD07
System UpdateLow urgencyCSMS #69357309 · Jul 27, 2026
Harmonized System Update (HSU) 2617
TariffLow urgencyCSMS #69326983 · Jul 23, 2026
Section 301 Forced Labor Import Duties
Action requiredTariffCritical urgencyCSMS #69324417 · Jul 23, 2026
Harmonized System Update (HSU) 2616
TariffLow urgencyCSMS #69302472 · Jul 21, 2026
Section 301 Duties on Certain Products from Brazil
Action requiredTariffCritical urgencyCSMS #68439049 · Apr 23, 2026
Harmonized System Update (HSU) 2608
TariffLow urgency
2025 · 6
CSMS #67032615 · Dec 8, 2025
Harmonized System Update (HSU) 2542
TariffLow urgencyCSMS #66494339 · Oct 10, 2025
UPDATE: Section 301 Vessel Fees
Action requiredTariffHigh urgencyCSMS #66427144 · Oct 3, 2025
Section 301 Vessel Fees
Action requiredTariffHigh urgencyCSMS #66077997 · Aug 29, 2025
GUIDANCE: Extension of Section 301 China Product Exclusions
Action requiredTariffCritical urgencyCSMS #66075832 · Aug 29, 2025
Harmonized System Update (HSU) 2534
TariffLow urgencyCSMS #65223125 · Jun 2, 2025
Harmonized System Update (HSU) 2520
TariffLow urgency
2024 · 14
CSMS #63577329 · Dec 31, 2024
GUIDANCE: Section 301 China Tariffs Four Year Review Increasing Additional Tariffs on Certain Imported Products
Action requiredTariffCritical urgencyCSMS #63114152 · Nov 20, 2024
GUIDANCE: Section 301 China Conforming Amendment
Action requiredTariffLow urgencyCSMS #62423962 · Sep 27, 2024
S301 Ship-to-Shore Crane (54-Record, Type 10) Deployed
Action requiredSystem UpdateHigh urgencyCSMS #62414621 · Sep 26, 2024
Harmonized System Update (HSU) 2413 and 2414
TariffLow urgencyCSMS #62411889 · Sep 26, 2024
GUIDANCE: Section 301 Four-Year Review Modifications
Action requiredTariffCritical urgencyCSMS #62375449 · Sep 24, 2024
CATAIR Entry Summary Create/Update and Error Dictionary Posted on CBP.Gov
System UpdateLow urgencyCSMS #62284627 · Sep 17, 2024
301 Ship to Shore Crane Certificate Designation
Action requiredSystem UpdateHigh urgencyCSMS #61247712 · Jul 3, 2024
GUIDANCE: Extension of Section 301 China Product Exclusions
Action requiredTariffMedium urgencyCSMS #61178419 · Jun 28, 2024
UPDATED - Harmonized System Updates (HSU) 2407 and 2408
TariffLow urgencyCSMS #61163504 · Jun 27, 2024
Harmonized System Updates (HSU) 2407 and 2408
TariffLow urgencyCSMS #60977392 · Jun 13, 2024
Harmonized System Update (HSU) 2406
TariffLow urgencyCSMS #60954319 · Jun 11, 2024
Reminder: New Section 301 Exclusion 9903.88.69
TariffHigh urgencyCSMS #60876581 · Jun 5, 2024
Harmonized System Update (HSU) 2405
TariffLow urgencyCSMS #60400881 · Apr 30, 2024
GUIDANCE: Section 301 China Conforming Amendment
Action requiredTariffMedium urgency
2023 · 5
CSMS #58869963 · Dec 29, 2023
GUIDANCE: Extension of Section 301 China Product Exclusions
Action requiredTariffCritical urgencyCSMS #57959304 · Oct 5, 2023
GUIDANCE: Section 301 Conforming Amendments to Previously (484f) Reinstated Exclusions
TariffLow urgencyCSMS #56517869 · Jun 5, 2023
GUIDANCE: Section 301 China COVID Product Exclusion Extensions
Action requiredTariffHigh urgencyCSMS #55230568 · Feb 23, 2023
GUIDANCE: Extension of Covid-19 Section 301 China Product Exclusions
Action requiredTariffHigh urgencyCSMS #55229384 · Feb 23, 2023
GUIDANCE: Section 301 China Conforming and Technical Amendments
Action requiredTariffMedium urgency
2022 · 15
CSMS #54535154 · Dec 30, 2022
Harmonized System Updates (HSU) 2230
TariffLow urgencyCSMS #54468100 · Dec 23, 2022
GUIDANCE: Extension of Section 301 China Product Exclusions
Action requiredTariffHigh urgencyCSMS #54197079 · Dec 1, 2022
GUIDANCE: Extension of Section 301 China Product Exclusions
Action requiredTariffCritical urgencyCSMS #53676546 · Oct 18, 2022
GUIDANCE: Section 301 China Conforming Amendments
Action requiredTariffHigh urgencyCSMS #53676220 · Oct 18, 2022
GUIDANCE: Section 301 China Technical Amendments to Section 301 Exclusions
Action requiredTariffMedium urgencyCSMS #52344900 · Jul 1, 2022
484(f) Changes Impacting Section 301 Duties and Exclusions
TariffLow urgencyCSMS #52055728 · Jun 1, 2022
GUIDANCE: Section 301 China Extension of Product Exclusions
Action requiredTariffCritical urgencyCSMS #51741965 · Apr 28, 2022
UPDATE on Section 301 China Reinstatement HTSUS and two additional HTS numbers identified.
Action requiredTariffMedium urgencyCSMS #51597300 · Apr 13, 2022
CORRECTION: Section 301 China Reinstatement HTS 8536.50.9065
TariffMedium urgencyCSMS #51579946 · Apr 12, 2022
Harmonized System Update (HSU) 2209 created on April 11, 2022
TariffLow urgencyCSMS #51515097 · Apr 5, 2022
UPDATE: Section 301 China Reinstatement of Certain Exclusions
TariffHigh urgencyCSMS #51469298 · Mar 31, 2022
GUIDANCE: Section 301 China Reinstatement of Certain Exclusions
Action requiredTariffHigh urgencyCSMS #50980729 · Feb 9, 2022
UPDATED GUIDANCE: Section 301 China Conforming Amendment (Corrected)
Action requiredTariffHigh urgencyCSMS #50967853 · Feb 8, 2022
GUIDANCE: Section 301 China Conforming Amendment
Action requiredTariffHigh urgencyCSMS #50834787 · Jan 26, 2022
GUIDANCE: Modifications to the Harmonized Tariff Schedule of the United States – Section 301 China Remedy
Action requiredTariffHigh urgency
2021 · 19
CSMS #50516041 · Dec 27, 2021
GUIDANCE: Section 301 China Conforming Amendment (with attachment)
Action requiredTariffMedium urgencyCSMS #50515964 · Dec 27, 2021
GUIDANCE: Section 301 China Conforming Amendment
Action requiredTariffMedium urgencyCSMS #50264295 · Dec 2, 2021
Guidance for Liquidation Extension Requests and Protests Based on Pending Section 301 Litigation In Re Section 301 Cases, Court of International Trade No. 21-00052
Policy GuidanceLow urgencyCSMS #50183406 · Nov 24, 2021
Harmonized System Updates (HSU) 2112 and 2113
TariffHigh urgencyCSMS #50019756 · Nov 8, 2021
Guidance: Entry/Entry Summary Reporting for Components of Watches or Clocks Subject to Section 301 China Duties
Action requiredTariffMedium urgencyCSMS #49634975 · Sep 30, 2021
GUIDANCE: Section 301 China Duties Extension of Product Exclusions
Action requiredTariffCritical urgencyCSMS #49635050 · Sep 30, 2021
Harmonized System Update (HSU) 2109/Extend COVID-19 Related 301 CN Exclusions for 45-days
TariffHigh urgencyCSMS #49268401 · Sep 3, 2021
UPDATED GUIDANCE: Conforming Amendment to Section 301 China Product Exclusion
Action requiredTariffHigh urgencyCSMS #49195492 · Aug 27, 2021
UPDATED GUIDANCE: Conforming Amendment to Section 301 China Product Exclusion
Action requiredTariffHigh urgencyCSMS #49165775 · Aug 24, 2021
GUIDANCE: Conforming Amendment to Section 301 China Product Exclusion
Action requiredTariffHigh urgencyCSMS #49153305 · Aug 23, 2021
GUIDANCE: Five-Year Suspension of United Kingdom (UK) and European Union (EU) Duties in Section 301 Action: Enforcement of U.S. World Trade Organization (WTO) Rights in Large Civil Aircraft Dispute
Action requiredTariffHigh urgencyCSMS #47830638 · May 18, 2021
Guidance: Proper Entry/Entry Summary Reporting for Complete Golf Clubs with Components from Multiple Countries of Origin
Action requiredTariffMedium urgencyCSMS #47741425 · May 10, 2021
GUIDANCE: Section 301 Tranche 3 - $200B Technical Amendment
Action requiredTariffHigh urgencyCSMS #46607637 · Mar 15, 2021
GUIDANCE: Section 301 China Duties Extension of Product Exclusions
Action requiredTariffHigh urgencyCSMS #46590066 · Mar 12, 2021
GUIDANCE: Suspension of EU Duties in Section 301 Action: Enforcement of U.S. World Trade Organization (WTO) Rights in Large Civil Aircraft Dispute
Action requiredTariffCritical urgencyCSMS #46561075 · Mar 10, 2021
GUIDANCE: Suspension of UK Duties in Section 301 Action: Enforcement of U.S. World Trade Organization (WTO) Rights in Large Civil Aircraft Dispute
Action requiredTariffHigh urgencyCSMS #45963175 · Jan 27, 2021
Drawback Filing Reminder for Section 301 and/or 201 Duties
Action requiredTrade ProgramLow urgencyCSMS #45511086 · Jan 13, 2021
Harmonized System Update (HSU) 2101 created on January 12, 2021
TariffLow urgencyCSMS #45453497 · Jan 11, 2021
GUIDANCE: Revision of Section 301 Action: Enforcement of U.S. World Trade Organization Rights in Large Civil Aircraft Dispute
Action requiredTariffCritical urgency
Messages are matched to topics by AI and checked against a hand-labeled test set; trade actions are reviewed by hand with their Federal Register or CSMS citation. The message text is CBP's.
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