CSMS 63705053·Operational·January 12, 2025·View on csms.cbp.gov ↗

DELAYED: Section 321 Warning (Release 2) Originally Scheduled to Deploy January 11

Plain-English explanation

CSMS 63705053 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on January 12, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "DELAYED: Section 321 Warning (Release 2) Originally Scheduled to Deploy January 11". 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 # 63705053 - DELAYED: Section 321 Warning (Release 2) Originally Scheduled to Deploy January 11 U.S. Customs and Border Protection sent this bulletin at 01/12/2025 04:38 PM EST Cargo Systems Messaging Service CSMS # 63705053 - DELAYED: Section 321 Warning (Release 2) Originally Scheduled to Deploy January 11 The implementation of the second release of the Section 321 – Does Not Exceed $ 800 in Aggregated Shipments enhancement to the Automated Commercial Environment (ACE), originally scheduled for January 11, 2025, has been delayed due to a performance issue that was discovered at deployment. U.S. Customs and Border Protection (CBP) will communicate an updated implementation timeline in a future CSMS message. This enhancement will provide a warning in ACE when a de minimis shipment may exceed the $ 800 per person/per day threshold. For more information about the Section 321 warning, review the trade information notice: Section 321 – Does not exceed $ 800 in Aggregated Shipments – Release 2 . Related CSMS: 63650246 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 63705053?

CSMS 63705053 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "DELAYED: Section 321 Warning (Release 2) Originally Scheduled to Deploy January 11". 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 63705053 published?

CBP published CSMS 63705053 on January 12, 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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