CSMS 64596929·System update·March 31, 2025·View on csms.cbp.gov ↗

UPDATE: Deadline Extended and Updated Requirements for Submitting CBP Form 1302A Cargo Declaration via ACE Document Image System (DIS)

Plain-English explanation

CSMS 64596929 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (system update), published on March 31, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "UPDATE: Deadline Extended and Updated Requirements for Submitting CBP Form 1302A Cargo Declaration via ACE Document Image System (DIS)". 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 # 64596929 - UPDATE: Deadline Extended and Updated Requirements for Submitting CBP Form 1302A Cargo Declaration via ACE Document Image System (DIS) U.S. Customs and Border Protection sent this bulletin at 03/31/2025 04:49 PM EDT Cargo Systems Messaging Service CSMS # 64596929 - UPDATE: Deadline Extended and Updated Requirements for Submitting CBP Form 1302A Cargo Declaration via ACE Document Image System (DIS) Due to increased trade participation in the ACE Electronic Export Manifest (EEM) pilot, U.S. Customs and Border Protection (CBP) is extending the deadline for use of the Document Image System (DIS) as a method to submit the CBP Form 1302A Cargo Declaration. The new deadline is October 1, 2025. Updated requirements for DIS submission of CBP Form 1302A Cargo Declaration will be effective April 1st, 2025, as follows : To submit the export manifest via DIS, a filer must submit the current CBP Form 1302A Cargo Declaration - Outward with Commercial Forms and will also be required to submit an .xls document as a Supplemental Manifest Document. A new DIS SUPPLEMENTAL_1302A_MANIFEST_DOCUMENT document label code (DocCode: CBP168 ) was created. In addition to the current CBP Form 1302A Cargo Declaration - Outward with Commercial Forms , filers must use the new document code (CBP168) to submit the .xls Supplemental Manifest Document to CBP via DIS . The .xls Supplemental Manifest Document must contain the following column headers with data matching the Manifest Submission: a. SCAC Code of the Carrier b. Voyage Name c. Vessel Name d. Destination Country Code e. Port of Lading f. Port of Unlading g. Cargo Description h. Quantity i. Unit of Measure j. Shipper Name k. Shipper Address 1 l. Shipper Address 2 m. Shipper City n. Shiper State Code o. Shipper Zip Code p. Shipper Country q. BOL Number r. Date of Export This extension is intended to provide additional time for effected trade participants to adequately program and test with their assigned CBP Client Representatives. Trade participants currently programming and testing should work towards transitioning over to submitting 100% EEM prior to October 1, 2025. Submission of CBP Form 1302A will no longer be required in paper or via DIS once a carrier begins submitting all export manifests via EEM. Carriers currently submitting all export manifests via EEM are identified in Appendix P of the Electronic Export Manifest Implementation Guides . Interested carriers, non-vessel operators (NVO), vessel agents and service providers should contact their respective CBP Client Representative for more information. CBP Field Offices and trade participants can also submit questions directly to the Outbound Enforcement and Policy Branch at cbpvesselexportmanifest@cbp.dhs.gov . Related message: CSMS # 62296588 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 64596929?

CSMS 64596929 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "UPDATE: Deadline Extended and Updated Requirements for Submitting CBP Form 1302A Cargo Declaration via ACE Document Image System (DIS)". 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 64596929 published?

CBP published CSMS 64596929 on March 31, 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.

Learn more

Tandom guides relevant to CBP CSMS messages

Subscribe to and triage CBP CSMS messages

How to subscribe to CBP Cargo Systems Messaging Service and triage the messages that change broker filing behavior, without losing the ones that matter.

Open resource

Real-time alerts when a CSMS message changes a duty rate

Set up alerts when a CBP CSMS message changes a duty rate on an HTS code you depend on. Built for brokers, forwarders, and importer compliance teams.

Open resource

Find the right manufacturer or exporter rate in an AD/CVD order

Cash deposit cascade, separate rates, all-others, and PRC-wide rates. Worked example on case A-570-910 (galvanized welded steel pipe from China) with three exporter-specific rates.

Open resource

Determine if a product is in scope of an AD/CVD order

Scope text is authoritative; the HTS list is illustrative. Read scope, find past rulings, and file a 19 CFR 351.225 inquiry. Worked example on case A-570-106 (wooden cabinets from China).

Open resource

Bulk-classify SKU descriptions with the Tandom HTS Classifier API

Run thousands of product descriptions through HTS classification, score the confidence, and triage borderline rows. Public search endpoint plus the closed-beta three-layer Classifier.

Open resource

Check AD/CVD exposure by HTS code

A practical workflow for checking antidumping and countervailing duty exposure on a US entry. For brokers and ops teams who need the answer before filing.

Open resource

CSMS 64596929·System update·March 31, 2025·View on csms.cbp.gov ↗

UPDATE: Deadline Extended and Updated Requirements for Submitting CBP Form 1302A Cargo Declaration via ACE Document Image System (DIS)

Plain-English explanation

Message body

Full text as published by U.S. Customs and Border Protection

Frequently asked questions

What is CSMS 64596929?

When was CSMS 64596929 published?

CBP published CSMS 64596929 on March 31, 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?

Learn more

Tandom guides relevant to CBP CSMS messages

Subscribe to and triage CBP CSMS messages

How to subscribe to CBP Cargo Systems Messaging Service and triage the messages that change broker filing behavior, without losing the ones that matter.

Open resource

Real-time alerts when a CSMS message changes a duty rate

Set up alerts when a CBP CSMS message changes a duty rate on an HTS code you depend on. Built for brokers, forwarders, and importer compliance teams.

Open resource

Find the right manufacturer or exporter rate in an AD/CVD order

Cash deposit cascade, separate rates, all-others, and PRC-wide rates. Worked example on case A-570-910 (galvanized welded steel pipe from China) with three exporter-specific rates.

Open resource

Determine if a product is in scope of an AD/CVD order

Scope text is authoritative; the HTS list is illustrative. Read scope, find past rulings, and file a 19 CFR 351.225 inquiry. Worked example on case A-570-106 (wooden cabinets from China).

Open resource

Bulk-classify SKU descriptions with the Tandom HTS Classifier API

Run thousands of product descriptions through HTS classification, score the confidence, and triage borderline rows. Public search endpoint plus the closed-beta three-layer Classifier.

Open resource

Check AD/CVD exposure by HTS code

A practical workflow for checking antidumping and countervailing duty exposure on a US entry. For brokers and ops teams who need the answer before filing.

Open resource