CSMS 64270075·Operational·February 28, 2025·View on csms.cbp.gov ↗

5106 Requests for CBP Assigned Numbers

Plain-English explanation

CSMS 64270075 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on February 28, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "5106 Requests for CBP Assigned Numbers". 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 # 64270075 - 5106 Requests for CBP Assigned Numbers - ACE System Failure U.S. Customs and Border Protection sent this bulletin at 02/28/2025 12:56 PM EST Cargo Systems Messaging Service CSMS # 64270075 - 5106 Requests for CBP Assigned Numbers - ACE System Failure This message only applies to filers receiving an ACE System Failure on an initial 5106 request for a CBP Assigned Number (CAN). Please be advised that some 5106 transactions requesting a CAN are receiving an ACE System Failure (ASF) response when the data includes a T3 record with full legal name. It is anticipated that the fix to correct this issue will be deployed on Saturday, March 1. Until the fix is deployed, filers can omit the T3 record with full legal name on the initial request and immediately submit an “update” to include the full legal name on the T3 record. 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 64270075?

CSMS 64270075 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "5106 Requests for CBP Assigned Numbers". 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 64270075 published?

CBP published CSMS 64270075 on February 28, 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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