CBP added carnet reference codes to ACE truck manifest messages
CBP title: Updates to ACE Truck CAMIR - New Carnet Codes
This message is from December 16, 2025. Later CSMS messages may have changed it. See the latest trade news
What did CBP announce?
CBP announced updates to ACE truck manifest implementation guides to add new codes for Carnets, including a Bill of Lading Type code, Carnet Number and Carnet Expiration reference qualifiers, and related error codes. The changes let filers submit a Carnet number and expiration date in the Import Truck Manifest to improve processing at ports of entry. CBP said trade parties and software developers using EDI must update their systems, and that Certification and Production dates would be announced in a future CSMS.
What is Allied's position?
This message concerns EDI formatting for truck carriers and software providers, not the entries we file for importers. We do not manage truck manifest EDI transmissions, so this update does not change how we process client entries. Clients do not need to act, and a later CSMS may have set the actual effective dates, so ask us if you have a specific carnet shipment question.
General information, not legal advice.
What does the CBP message say?
U.S. Customs and Border Protection (CBP) has updated the following Automated Commercial Environment (ACE) truck implementation guides:
ANSI X12 Truck 309 Customs Manifest (https://www.cbp.gov/document/technical-documentation/ace-truck-manifest-309-message)
- Add new Bill of Lading Type code for Carnet (40)
- Add new Reference Identification Qualifier for “Carnet Number” (CRN) and “Carnet Expiration” (CRE)
EDIFACT Truck CUSCAR Import Manifest (https://www.cbp.gov/document/guidance/standard-truck-manifest-cuscar-cargo-report-message)
- Add new Document Name code type for Carnet (40)
• Add new Document Name code for “Carnet Number” (960) and “Carnet Expiration” (961)
EDIFACT Truck CUSRES Accept/Reject Manifest (https://www.cbp.gov/document/guidance/ace-customs-response-message) and ANSI X12 Truck 355 Accept/Reject Manifest (https://www.cbp.gov/document/technical-documentation/ace-truck-manifest-ansi-x12-355-message)
• Add new error codes
- 551 – INVALID OR MISSING CARNET NUMBER
- 552 – INVALID OR MISSING CARNET EXPIRATION DATE
Please note that these updates are part of an ACE enhancement that will allow filers to submit a Carnet # and a Carnet expiration date in Import Truck Manifest to improve processing of Carnets at ports of entry.
Trade and Software Developers that submit via the Electronic Data Interface (EDI) will need to make the appropriate updates to incorporate these changes.
The Certification (CERT) and Production (PROD) dates for these specific technical changes will be announced in a future CSMS.
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 (mailto:CREM@cbp.dhs.gov).