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ACE Truck Manifest Modernization

CSMS #51674047 - ACE Truck Manifest Modernization – Next Deployment Set for April 24



On January 30, 2022, U.S. Customs and Border Protection (CBP) began the multi-release deployment of Enhancements to ACE Truck Manifest – Phase 2, also known as ACE Truck Manifest Modernization (TMM). The first deployment took place at the port of Brownsville, TX, and the second deployment occurred at the port of Buffalo, NY. The next deployment will occur on April 24, 2022 at the port of Laredo, TX.

Enhancements to ACE Truck Manifest – Phase 2 is focused on enhancing the CBP user interface (UI) for the primary and secondary processing of truck manifests. As part of this deployment, previously relaxed validations in the legacy truck manifest application are now supported in TMM and may result in errors for some trade users. To prepare for the upcoming deployments and avoid potential errors, please review the validations as documented in the Truck Manifest X.12 - 309 and EDIFACT CUSCAR EDI implementation guides found at For additional information, please review CSMS #51405084.

The schedule below reflects the remaining deployment schedule for Phase 2 of TMM:

  • April 24, 2022 – Laredo, TX
  • May 15, 2022 – Detroit, MI
  • June 5, 2022 – All remaining ports
  • Retire legacy truck manifest application (R4): June 20, 2022

In addition, CBP is preparing for the deployment of Enhancements to ACE Truck Manifest – Phase 3, which will finalize the modernization of ACE truck manifest functionality and will complete all backend services used for EDI processing.

Implementing the capabilities developed in Phase 2, deployment of Phase 3 enhancements will provide trade users with new messaging regarding modifications to Crew, Vehicle, Cargo and Seals. The Phase 3 deployment is currently set for July 11, 2022. More information on Phase 3 and the implementation of Phase 2 enhancements, including details for Certification (CERT) environment testing and updated Implementation Guides, is forthcoming.

For questions about TMM and the upcoming deployments, please contact For issues with truck manifest EDI functionality, please contact your client representative.

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