CSMS 66077997·Trade policy·August 29, 2025·View on csms.cbp.gov ↗

GUIDANCE: Extension of Section 301 China Product Exclusions

Plain-English explanation

CSMS 66077997 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (trade policy), published on August 29, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "GUIDANCE: Extension of Section 301 China Product Exclusions". CSMS messages are the operational layer between Commerce determinations and at-the-border collections: when Commerce publishes a new rate, scope ruling, or instruction, CBP turns it into a CSMS that ACE/ACS systems and brokers act on.

Message body

Full text as published by U.S. Customs and Border Protection

CSMS # 66077997 - GUIDANCE: Extension of Section 301 China Product Exclusions U.S. Customs and Border Protection sent this bulletin at 08/29/2025 05:30 PM EDT Cargo Systems Messaging Service CSMS # 66077997 - GUIDANCE: Extension of Section 301 China Product Exclusions The purpose of this message is to provide guidance on the extension of certain product specific exclusions and certain manufacturing equipment exclusions from Section 301 duties on imports of Chinese goods through November 29, 2025. BACKGROUND On August 29, 2025, the United States Trade Representative (USTR) announced the extension of 164 product specific exclusions and 14 exclusions covering certain manufacturing equipment subject to Section 301 duties through November 29, 2025. The Automated Commercial Environment (ACE) functionality for the acceptance of these exclusions is immediately available. GUIDANCE Instructions for importers, customs brokers, and filers on submitting entries to CBP containing granted exclusions by the USTR from Section 301 measures: For the list of Harmonized Schedule Tariff of the United States (HTSUS) classifications covered by Section 301 exclusions under HTSUS 9903.88.69 and 9903.88.70, refer to Federal Register notices 89 FR 46948 and 89 FR 76581 . With respect to goods entered for consumption, or withdrawn from warehouse for consumption, on or after 12:01 a.m. eastern time on September 1, 2025, and before 11:59 p.m. eastern time on November 29, 2025, file HTSUS 9903.88.69 or 9903.88.70 to claim the applicable Section 301 exclusions, as appropriate. Reminder: importers, brokers, and/or filers should refer to CSMS # 64018403 (Entry Summary Order of Reporting for Multiple HTS when 98 or 99 HTS are required) for guidance when filing an entry summary in which a heading or subheading in Chapter 99 is claimed on imported merchandise. For ease of reference, a summary of Section 301 duties and product exclusion notifications is attached. Related CSMS: 58869963, 55230568, 55229384, 53676546, 53676220, 54197079, 54468100, 51675127, 51741965, 51515097, 51469298, 50967853, 50980729, 51166038, 50834787, 50516041, 50264295, 50183808, 50019756, 49634975, 49268401, 49195492, 49165775, 49153305, 47830638, 47741425, 46607637, 46590066, 46561075, 45453497, 45318223, 44905878, 44451479, 44450418 Section 301 Tranches and Rounds chart 08282025.pdf Update your subscriptions, modify your password or e-mail address, or stop subscriptions at any time on your Subscriber Preferences Page . You will need to use your e-mail address to log in. If you have questions or problems with the subscription service, please contact subscriberhelp.govdelivery.com . This service is provided to you at no charge by U.S. Customs and Border Protection . Privacy Policy | GovDelivery is providing this information on behalf of U.S. Department of Homeland Security, and may not use the information for any other purposes. Powered by Privacy Policy | Cookie Statement | Help

Frequently asked questions

What is CSMS 66077997?

CSMS 66077997 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "GUIDANCE: Extension of Section 301 China Product Exclusions". CSMS bulletins are the operational instructions CBP issues to brokers, importers, and ACE filers covering rate changes, system updates, scope guidance, and other day-to-day customs-operations changes.

When was CSMS 66077997 published?

CBP published CSMS 66077997 on August 29, 2025. The bulletin's instructions are typically operative as of the publication date unless the body specifies a different effective date.

Is the CBP CSMS the legally binding instruction?

Yes — for at-the-border filing and entry collection. CSMS messages translate Commerce's Federal Register determinations into operational CBP instructions that ACE/ACS systems and brokers execute. The Federal Register notice is the underlying legal authority; the CSMS is the operational implementation. Both should be read together when reconciling a rate or scope change.

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