CSMS 64824427·Operational·April 22, 2025·View on csms.cbp.gov ↗

Truck Manifest Implementation Guide Update – Section 321 U.S. State Codes

Plain-English explanation

CSMS 64824427 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on April 22, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "Truck Manifest Implementation Guide Update – Section 321 U.S. State Codes". 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 # 64824427 - Truck Manifest Implementation Guide Update – Section 321 U.S. State Codes U.S. Customs and Border Protection sent this bulletin at 04/22/2025 03:31 PM EDT Cargo Systems Messaging Service CSMS # 64824427 - Truck Manifest Implementation Guide Update – Section 321 U.S. State Codes The ACE Truck Manifest ANSI X12 309 Message Implementation Guide has been updated with clarification that consignees for Section 321 bill types (13, 35) must provide a valid U.S state code. This requirement is in alignment with 19 C.F.R. § 142.3 and Customs Directive No. 3550-079A. NOTE: Trade and Software Developers that submit via the Electronic Data Interface (EDI) will need to program and test their software to incorporate these changes. Please reach out to your Client Representative if you have any technical-related questions. For any questions about this update, please email 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 64824427?

CSMS 64824427 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Truck Manifest Implementation Guide Update – Section 321 U.S. State Codes". 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 64824427 published?

CBP published CSMS 64824427 on April 22, 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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