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Section 232 tariffs: every CBP message

Section 232 of the Trade Expansion Act of 1962 lets the President adjust imports of products that the Commerce Department finds threaten to impair national security. It has been used for duties on steel and aluminum since 2018, and on a growing list of other products since.

CBP’s CSMS messages on Section 232 cover the Chapter 99 numbers to report, which derivative products are in scope, how to declare metal content and country of melt and pour, and changes to rates and exclusions.

169 CSMS messages since January 2021 · 82 needed action · latest Nov 12, 2026 · 20 key trade actions

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On the trade timeline

Trade timeline preview: Section 232 messages and trade actions over timeExplore Section 232 on the trade timeline →

Key trade actionsnewest first

  1. Section 232 entry prohibition on certain polysilicon imposed under Proclamation 11052

    91 FR 51975 · CSMS #69994928

  2. Section 232 duties on unmanned aircraft systems and components imposed by Proclamation 11055

    91 FR 53699 · CSMS #69738151

  3. Section 232 duties of 100% on patented pharmaceuticals imposed by Proclamation 11020

    91 FR 18183 · CSMS #69395344 · CSMS #70054007 · CSMS #69415934

  4. Section 232 duties on aluminum, steel, and copper derivatives modified by Proclamation 11032

    91 FR 34085; 91 FR 18201 · CSMS #68855869

  5. Section 232 duties on auto parts and wood products of Taiwan modified to 15% by Commerce and USTR notice (91 FR 31818)

    91 FR 31818 · CSMS #68762890

  6. Section 232 duties on aluminum, steel, and copper modified by Proclamation 11021

    91 FR 18201 · CSMS #68253075 · CSMS #68554727

  7. Section 232 duties of 25% on certain semiconductors imposed by Proclamation 11002

    91 FR 2443 · CSMS #67400472

  8. Section 232 duties on medium- and heavy-duty vehicles, parts, and buses imposed by Proclamation 10984

    90 FR 48451 · CSMS #66665333

  9. Duties on products of South Korea modified to 15% by Commerce and USTR notice (90 FR 55964)

    90 FR 55964 · CSMS #66987366

  10. Section 232 duties on timber, lumber, and derivative products imposed by Proclamation 10976

    90 FR 48127 · CSMS #66492057

  11. Section 232 duties of 50% on copper products imposed by Proclamation 10962

    90 FR 37727 · CSMS #65794272

  12. Section 232 duties on automobiles and parts from the European Union modified to 15% by Commerce and USTR notice (90 FR 46136)

    90 FR 46136 · CSMS #66336270

  13. Section 232 duties on products of the United Kingdom modified by Executive Order 14309

    90 FR 26419 · CSMS #65475725

  14. Section 232 duties on steel and aluminum modified to 50% by Proclamation 10947

    90 FR 24199 · CSMS #65236374 · CSMS #65405824 · CSMS #65236574

  15. Section 232 duties of 25% on passenger vehicles and light trucks imposed by Proclamation 10908

    90 FR 14705 · CSMS #64624801

  16. Section 232 duties on steel and aluminum modified to 25% for all countries by Proclamations 10895 and 10896

    90 FR 9807; 90 FR 9817 · CSMS #64348411 · CSMS #64639013 · CSMS #64348288

  17. Section 232 tariff-rate quotas on EU steel and aluminum extended by Proclamations 10690 and 10691

    89 FR 223; 89 FR 227 · CSMS #58914518

  18. Section 232 duties of 200% on aluminum from Russia imposed by Proclamation 10522

    88 FR 13267 · CSMS #55402109 · CSMS #55701614

  19. Section 232 duties on steel from Japan modified to a tariff-rate quota by Proclamation 10356

    87 FR 19351 · CSMS #51475475

  20. Section 232 duties on EU steel and aluminum modified to tariff-rate quotas by Proclamations 10327 and 10328

    87 FR 1; 87 FR 11 · CSMS #50536327

Every CSMS message on Section 232169

2026 · 32

2025 · 47

2024 · 33

2023 · 27

2022 · 16

2021 · 14

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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