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What changed at U.S. Customs?
Every message from the CBP Cargo Systems Messaging Service (CSMS), with a plain-English summary and Allied CHB's position. We add new messages every hour.
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CBP Ends 'Flying Trucks' Air Manifest Process for Truck Cargo by Nov 24, 2026
CBP announced it is terminating the 'Flying Trucks' process, which let some express carriers file air manifests for cargo that actually crossed the border by truck. CBP says this practice violates 19 CFR 123.92, which requires manifest data to match the actual mode of transport. The change is effective immediately, but CBP gives carriers a 90-day transition period ending November 24, 2026, to switch to proper truck manifest filing. Carriers still using this process after that date risk delays, penalties, or other enforcement.
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This notice concerns carrier manifest filing, not the customs entries Allied files. We do not file truck or air manifests, so this change does not directly affect our entry process. If a client's goods move by truck under this process, we recommend confirming with the carrier that truck manifest filing is in place before November 24, 2026 to avoid arrival delays.
CBP updated technical guide for truck export manifest data field
CBP announced an update to the Electronic Export Manifest (EEM) Truck Manifest Implementation Guide for the 358 Customs Consist message. The change sets the usage of field M1306 to mandatory. It applies to the ACE Exports Truck X12 358 message format used for electronic export manifests.
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This update concerns the technical format that truck carriers and their software providers use to file export manifest data in ACE. It does not change import entry filing, so it does not affect the entries we file for clients. Clients who file export manifests directly or through a service provider should confirm with their software vendor that this field update was applied.
CBP updated technical guides for electronic export truck manifest EDI messages
CBP announced updates to the Electronic Export Manifest Automated Commercial Environment implementation guides for the Exports Truck UNEDIFACT CUSCAR, CUSREP, CUSRES, PAXLST, 309, 350, and 355 messages. The changes involved technical edits such as removed codes, updated data element usage, and corrected typos in the EDI specifications. CBP directed technical questions to client representatives and policy questions to its export manifest mailbox.
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This message covered technical EDI formatting changes for truck export manifest transmissions and mainly concerns carriers and software providers that send these EDI messages to CBP. Allied files import entries and does not transmit export manifest EDI data, so this update does not change the entries we file for clients. Clients who transmit their own export manifest data should confirm with their EDI provider that these formatting updates were applied, and later CSMS messages may have changed these specifications further.
CBP resolved earlier ACE Truck Manifest access issue
CBP announced that an earlier outage affecting ACE Portal Truck Manifest and References Tab applications, including ACE Reports, was resolved. CBP advised users to clear their browser cache and try again. This message is from May 1, 2026 and is now over 30 days old.
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This notice only confirmed a past ACE system outage was fixed and does not affect current entries. Clients do not need to take any action on this. If clients are experiencing ongoing ACE access issues today, they should contact us so we can check current system status.
CBP resolved earlier ACE Truck Manifest and References Tab outage
CBP announced that the ACE Portal Truck Manifest and References Tab applications, along with ACE Reports in the ACE Mod Portal, were unavailable and have since been restored. CBP advised users to clear their browser cache to regain access. The notice affected users of these specific ACE Mod Portal applications.
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This was a temporary ACE Mod Portal access issue that CBP resolved shortly after it arose. It did not change any filing rules or entry requirements, and later CSMS messages have not referenced it further. Clients do not need to take any action regarding this notice.
ACE truck manifest and references tab were briefly unavailable in April 2026
CBP announced that the ACE Truck Manifest and References Tab applications, including ACE Reports, were unavailable in the ACE Mod Portal. CBP said EDI processing was not affected and all other ACE applications remained available. CBP said it would issue another message once the issue was resolved.
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This outage affected only certain ACE Mod Portal applications and did not affect EDI filings we submit for clients. CBP indicated a follow-up message would confirm when service was restored, and a later CSMS may have already done so. Clients do not need to take any action regarding this notice.
CBP updates truck export manifest and conveyance report technical specs
CBP announced technical updates to the Electronic Export Manifest Truck 309 Customs Manifest and the CUSREP Conveyance Report in ACE. Changes include marking one data element as not used, removing a cancellation code, updating language for one code, and revising descriptions for two other codes. The message was published April 22, 2026 and directs technical questions to CBP client representatives and policy questions to a CBP email address.
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This message concerns technical data formatting for truck export manifest filings, which is a carrier and export filing function. It does not affect the import entries Allied files for clients. Clients do not need to take any action.
CBP updated technical guides for truck export manifest EDI messages
CBP updated the Electronic Export Manifest Implementation Guides for the ACE Exports Truck UNEDIFACT CUSCAR, CUSRES, CUSREP, X12 309, and PAXLST messages. The changes added codes for Post Departure Filing and Automated Export System downtime, removed confirmation of manifest and trip reporting language, and changed wording from Final Transmission to Complete Transmission. CBP directed technical questions to client representatives and policy questions to its export manifest mailbox.
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This message set technical data formatting rules for carriers and software providers that transmit truck export manifests through ACE. It does not change import entry filing, duty rates, or documentation Allied handles for clients. Clients do not need to act, but if a client also files export manifests directly, they should confirm with their software provider that these guide updates were applied.
CBP reported temporary ACE air manifest system outage in March 2026
CBP announced degradation in ACE air manifest processing on March 24, 2026. It said ACE MMM/TMM and EDI processing would be unavailable for about 45 minutes while it restarted services. CBP said it would send a follow-up message once the issue was resolved.
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This was a short, one-time system outage from March 2026 and does not affect current filings. Clients do not need to act on this notice. If a client has questions about entries filed during that window, they should ask us to review the specific entry.
CBP resolved earlier ACE Air Manifest processing slowdown
CBP announced that a processing degradation issue affecting ACE Air Manifest had been resolved and that ACE was operating normally again. The message did not describe the cause or duration of the issue. It applied to air cargo manifest filings processed through ACE.
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This was a routine system status update from March 2026 about a temporary ACE Air Manifest slowdown that CBP said was fixed. It did not change any filing requirements, so it has no ongoing effect on entries we file today. Clients do not need to take any action regarding this notice.
CBP added ATA Carnet data fields to ACE truck manifest filings in March 2026
CBP announced that on March 24, 2026 it enhanced the Automated Commercial Environment (ACE) to let trade users include ATA Carnet information in electronic truck manifest filings. The update involved electronic data interchange (EDI) changes. CBP referred filers to an attached information notice for details.
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This was a system enhancement for truck manifest filers and did not require action from importers or shippers. It concerned how carrier and broker EDI systems transmit carnet data to CBP, not the goods or duties on an entry. Clients do not need to act on this notice; if a specific truck shipment involving an ATA Carnet needs review, ask Allied about that entry.
CBP updated technical guide for truck export manifest acceptance messages
CBP announced updates to the Electronic Export Manifest Truck X12-355 Acceptance/Rejection Message Implementation Guide. The changes corrected a typo and reduced the maximum use counts in the REF and VEH segments to one. CBP directed technical questions to client representatives and policy questions to its export manifest mailbox.
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This update concerns the technical data format for electronic export manifests filed by truck carriers, not the import entries Allied files for clients. It does not change any import entry, classification, or duty requirement. Clients do not need to take any action.
The summaries and positions are general information, not legal advice. Always check the official CBP message, which each page links to.
Does a change affect your entries?
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