CSMS 65845401·Operational·August 6, 2025·View on csms.cbp.gov ↗

Harmonized System Update (HSU) 2530 and 2531

Plain-English explanation

CSMS 65845401 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on August 6, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "Harmonized System Update (HSU) 2530 and 2531". 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 # 65845401 - Harmonized System Update (HSU) 2530 and 2531 U.S. Customs and Border Protection sent this bulletin at 08/06/2025 10:17 AM EDT Cargo Systems Messaging Service CSMS # 65845401 - Harmonized System Update (HSU) 2530 and 2531 Harmonized System Update (HSU) 2530 was created on August 05, 2025, and contains 135 Harmonized Tariff Records and 404 ABI records. Harmonized System Update (HSU) 2531 was created on August 05, 2025, and contains 2 Harmonized Tariff Records and 4 ABI records. HSU 2530 includes the additional duties on imports from Brazil effective August 06,2025, the Reciprocal Tariff Updates effective August 07, 2025, and miscellaneous tariff adjustments required by verification of the 2025 Harmonized Tariff Schedule (HTS). For additional information on the Brazil updates please see Executive Order and related CSMS # 65807735 . For more information on the Reciprocal Tariff Updates please see Executive Order and related CSMS # 65829726 . HSU 2531 includes an update to the countries of origin for the EU Reciprocal Tariffs. Questions regarding the latest Executive Order, Trade remedy update or entry filing requirements should be directed to traderemedy@cbp.dhs.gov or otentrysummary@cbp.dhs.gov . Questions or concerns with the Harmonized System Update should be directed to the HTS admin at HTSadmin@cbp.dhs.gov . Related messages: CSMS # 65807735 and CSMS # 65829726 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 65845401?

CSMS 65845401 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Harmonized System Update (HSU) 2530 and 2531". 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 65845401 published?

CBP published CSMS 65845401 on August 6, 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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