CSMS 66026456·Operational·August 25, 2025·View on csms.cbp.gov ↗

Production (PROD) Deployment of Error Code Message

Plain-English explanation

CSMS 66026456 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on August 25, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "Production (PROD) Deployment of Error Code Message". 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 # 66026456 - Production (PROD) Deployment of Error Code Message U.S. Customs and Border Protection sent this bulletin at 08/25/2025 04:57 PM EDT Cargo Systems Messaging Service CSMS # 66026456 - Production (PROD) Deployment of Error Code Message On August 26, 2025, U.S. Customs and Border Protection (CBP) will deploy the following error code message to the Automated Commercial Environment (ACE) Cargo Release Production (PROD) environment: 321 - FIRMS LOCATION NOT IN THE SAME PORT CLUSTER This error code change is reflected in the Cargo Release Condition Codes document dated August 6, 2025, which can be found on the Supporting Documents tab on cbp.gov. For any technical questions regarding this update, please contact your assigned Client Representative. Other questions regarding Cargo Control and Release should be directed to CREM@cbp.dhs.gov . 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 66026456?

CSMS 66026456 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Production (PROD) Deployment of Error Code Message". 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 66026456 published?

CBP published CSMS 66026456 on August 25, 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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