CSMS Weekly Digest: Apr 18 - Apr 24, 2026
Here's your weekly summary of 8 CSMS messages from U.S. Customs and Border Protection.
Action Required(8)
Several high-priority items require immediate attention this week, including new ACE drawback error validations now live in production, CAPE availability for IEEPA refunds, and updated Jones Act waiver guidance. Brokers should also plan around two ACE maintenance windows and review the updated Entry Summary Error Dictionary and EEM Truck Manifest Implementation Guide.
Updated Guidance #3: Implementation of Jones Act Waiver issued to the Department of War, dated March 17, 2026
U.S. Customs and Border Protection (CBP) is providing updated guidance to CSMS #68096516, CSMS #68180454, and CSMS #68370692. This guidance serves as notice that the Department of Homeland Security (D...
Harmonized System Update (HSU) 2608
Harmonized System Update (HSU) 2608 was created on April 22, 2026, and contains 39 Harmonized Tariff Records and 123 ABI records. This HSU includes Section 301 Large Civil Aircraft (LCA) HTS updates...
ACE Production Standard Invasive Maintenance from 10:00 p.m. ET Saturday, April 25, 2026 to 4:00 a.m. ET Sunday, April 26, 2026
There will be ACE production standard invasive maintenance from 10:00 p.m. ET Saturday, April 25, 2026, to 4:00 a.m. ET Sunday, April 26, 2026.
Update to Electronic Export Manifest (EEM) – Truck Manifest Implementation Guide (IG) 309 Truck Export Customs Manifest, and CUSREP Conveyance Report
U.S. Customs and Border Protection has updated the Electronic Export Manifest (EEM) [ https://www.cbp.gov/trade/automated/how-to-use-ace/export-manifest ] Automated Commercial Environment (ACE) Export...
ACE Certification Standard Invasive Maintenance Window on April 22, 2026, from 5:00 pm to 8:00 pm ET
Please be advised there will be an ACE Certification Standard Invasive Maintenance Window on April 22, 2026, from 5:00 pm to 8:00 pm ET.
New ACE Drawback Error Validations Set to Deploy to PROD April 21, 2026
U.S. Customs and Border Protection will deploy two new error messages for Drawback to the Automated Commercial Environment (ACE) Production (PROD) environment on Tuesday, April 21, 2026. These new val...
Updated ACE Entry Summary Error Dictionary Now Available on CBP.gov
U.S. Customs and Border Protection (CBP) has published an updated ACE Entry Summary Error Dictionary. The updated version includes a new validation error that occurs when a filer attempts to file a po...
AVAILABLE NOW – Consolidated Administration and Processing of Entries (CAPE) for IEEPA Refunds
U.S. Customs and Border Protection (CBP) has activated the first phase of the Consolidated Administration and Processing of Entries (CAPE) tool in the Automated Commercial Environment Secure Data Port...
Policy Guidance(1)
CBP has issued Updated Guidance #3 on the implementation of the Jones Act Waiver granted to the Department of War, dated March 17, 2026. Brokers handling affected shipments should review this guidance promptly to ensure compliance with current waiver parameters.
Tariff(1)
Harmonized System Update (HSU) 2608 has been released and should be reviewed for any HTS classification changes that may impact pending or upcoming entries.
System Update(4)
Key ACE changes this week include new drawback error validations now deployed to production, an updated Entry Summary Error Dictionary on CBP.gov, and CAPE now available for processing IEEPA refunds. The EEM Truck Manifest Implementation Guide (IG 309) and CUSREP Conveyance Report have also been updated, requiring review by any brokers or filers involved in truck export manifests.
Update to Electronic Export Manifest (EEM) – Truck Manifest Implementation Guide (IG) 309 Truck Export Customs Manifest, and CUSREP Conveyance Report
U.S. Customs and Border Protection has updated the Electronic Export Manifest (EEM) [ https://www.cbp.gov/trade/automated/how-to-use-ace/export-manifest ] Automated Commercial Environment (ACE) Export...
New ACE Drawback Error Validations Set to Deploy to PROD April 21, 2026
U.S. Customs and Border Protection will deploy two new error messages for Drawback to the Automated Commercial Environment (ACE) Production (PROD) environment on Tuesday, April 21, 2026. These new val...
Updated ACE Entry Summary Error Dictionary Now Available on CBP.gov
U.S. Customs and Border Protection (CBP) has published an updated ACE Entry Summary Error Dictionary. The updated version includes a new validation error that occurs when a filer attempts to file a po...
AVAILABLE NOW – Consolidated Administration and Processing of Entries (CAPE) for IEEPA Refunds
U.S. Customs and Border Protection (CBP) has activated the first phase of the Consolidated Administration and Processing of Entries (CAPE) tool in the Automated Commercial Environment Secure Data Port...
System Maintenance(2)
ACE Certification will be unavailable April 22 from 5:00–8:00 p.m. ET, and ACE Production will undergo invasive maintenance from 10:00 p.m. ET April 25 to 4:00 a.m. ET April 26. Plan filing schedules accordingly to avoid disruptions during these windows.
ACE Production Standard Invasive Maintenance from 10:00 p.m. ET Saturday, April 25, 2026 to 4:00 a.m. ET Sunday, April 26, 2026
There will be ACE production standard invasive maintenance from 10:00 p.m. ET Saturday, April 25, 2026, to 4:00 a.m. ET Sunday, April 26, 2026.
ACE Certification Standard Invasive Maintenance Window on April 22, 2026, from 5:00 pm to 8:00 pm ET
Please be advised there will be an ACE Certification Standard Invasive Maintenance Window on April 22, 2026, from 5:00 pm to 8:00 pm ET.