CSMS 66383734·Operational·September 29, 2025·View on csms.cbp.gov ↗

Automated Rejection of Manifest Filings with Insufficient Cargo Information Enhancement Deployed September 27, 2025

Plain-English explanation

CSMS 66383734 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on September 29, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "Automated Rejection of Manifest Filings with Insufficient Cargo Information Enhancement Deployed September 27, 2025". 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 # 66383734 - Automated Rejection of Manifest Filings with Insufficient Cargo Information Enhancement Deployed September 27, 2025 U.S. Customs and Border Protection sent this bulletin at 09/29/2025 04:20 PM EDT Cargo Systems Messaging Service CSMS # 66383734 - Automated Rejection of Manifest Filings with Insufficient Cargo Information Enhancement Deployed September 27, 2025 On September 27, 2025 , U.S. Customs and Border Protection (CBP) deployed the Automated Rejection of Manifest Filings with Insufficient Cargo Information enhancement to the Automated Commercial Environment (ACE). This enhancement implements the automated rejection of ACE Manifest filings that have insufficient cargo descriptions, consignee information, and shipper information .  It also deploys new disposition codes that will be sent when holds are manually placed or removed by CBP when cargo descriptions, consignee information, or shipper information are insufficient. More information about the enhancement, including corresponding codes, is available in the Information Notice for trade users . Trade users may refer to CBP’s list of Examples of Unacceptable vs Acceptable Cargo Descriptions for guidance commodity descriptions. The list is not exhaustive and will continue to be revised. Please reach out to your Client Representative if you have any technical questions. For any questions about this update, please email CREM@cbp.dhs.gov . Related Message Number(s): CSMS # 66213957 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 66383734?

CSMS 66383734 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Automated Rejection of Manifest Filings with Insufficient Cargo Information Enhancement Deployed September 27, 2025". 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 66383734 published?

CBP published CSMS 66383734 on September 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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