CSMS 65505322·Operational·July 1, 2025·View on csms.cbp.gov ↗

Harmonized System Update (HSU) 2525 and 2526

Plain-English explanation

CSMS 65505322 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on July 1, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "Harmonized System Update (HSU) 2525 and 2526". 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 # 65505322 - Harmonized System Update (HSU) 2525 and 2526 U.S. Customs and Border Protection sent this bulletin at 07/01/2025 10:02 AM EDT Cargo Systems Messaging Service CSMS # 65505322 - Harmonized System Update (HSU) 2525 and 2526 Harmonized System Update (HSU) 2525 was created on June 28, 2025, and contains 3 Harmonized Tariff Records and 9 ABI records. Harmonized System Update (HSU) 2526 was created on June 30, 2025, and contains 32 Harmonized Tariff Records and 131 ABI records. HSU 2525 includes the United States of America-United Kingdom Economic Prosperity Deal effective 6/30/2025. For more information please see EO 14309 . HSU 2526 includes several adjustments to the Mid-Year 484(f) changes effective July 1,2025, required by the verification of the 2025 Harmonized Tariff Schedule (HTS). For more information on the Mid-Year 484(f) changes please visit USITC.gov . Questions regarding the US/UK Prosperity Deal should be directed to the Trade Remedy inbox at traderemedy@cbp.dhs.gov . Questions or concerns with the Harmonized System Update should be directed to the HTS admin @ HTSadmin@cbp.dhs.gov . Related message: CSMS # 65475725 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 65505322?

CSMS 65505322 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Harmonized System Update (HSU) 2525 and 2526". 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 65505322 published?

CBP published CSMS 65505322 on July 1, 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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