CSMS Weekly Digest: Aug 15 - Aug 21, 2026
Here's your weekly summary of 10 CSMS messages from U.S. Customs and Border Protection.
Action Required(2)
Brokers should immediately verify ACH enrollment for any clients with pending refunds, as rejected refunds due to missing enrollment require prompt attention before funds are lost. Additionally, the new Section 338 additional duties on certain Canadian goods require classification and entry review to ensure proper duty assessment.
Section 338 Additional Duties on Certain Goods of Canada
The purpose of this message is to provide guidance on the implementation of the July 20, 2026, Presidential Proclamations" on"" ""Imposing Additional Duties to Offset Canadian Discrimination Against t...
IMPORTANT: Review ACE Reports for Rejected Refunds Due to Lack of ACH Enrollment
U.S. Customs and Border Protection (CBP) advises Customs brokers to use the "ACH Rejected Refunds Report (REV-613)" report in the Automated Commercial Environment (ACE) Reports tool to help importers ...
Tariff(2)
Section 338 additional duties on certain goods of Canada are now in effect, requiring brokers to review affected HTS classifications and entry filings accordingly. HSU 2620 has also been issued, so verify your tariff schedule is current before filing.
Section 338 Additional Duties on Certain Goods of Canada
The purpose of this message is to provide guidance on the implementation of the July 20, 2026, Presidential Proclamations" on"" ""Imposing Additional Duties to Offset Canadian Discrimination Against t...
Harmonized System Update (HSU) 2620
Harmonized System Update (HSU) 2620 was created on August 14, 2026, and contains 16 harmonized tariff records and 53 Automated Broker Interface (ABI) records. HSU 2620 contains the Quartz Surface Pro...
System Update(3)
ACE Manifest Modernization Release 2 for Rail (INT-061) is available in the certification environment for testing ahead of its September 22, 2026 production deployment — rail manifest filers should begin testing now. Additionally, updated Drawback Error Dictionary validations for FD07 are live, so review your drawback filing processes to ensure compliance with the new validation rules.
ACE Manifest Modernization Release 2-Rail (INT-061) is in Certification Environment for Testing and Scheduled to Deploy to Production September 22, 2026
U.S. Customs and Border Protection is modernizing the Automated Commercial Environment (ACE) ocean, rail, and air manifest systems over several releases. The second release of this enhancement (INT-06...
IMPORTANT: Review ACE Reports for Rejected Refunds Due to Lack of ACH Enrollment
U.S. Customs and Border Protection (CBP) advises Customs brokers to use the "ACH Rejected Refunds Report (REV-613)" report in the Automated Commercial Environment (ACE) Reports tool to help importers ...
Notice of Update to Drawback Error Dictionary Validations for FD07
CORRECTION: HTSUS classifications 9903.05.01 associated with Section 301 Duties on Certain Products from Brazil and 9903.05.20-9903.05.84 associated with Section 301 Forced Labor Import Duties *_are_*...
System Maintenance(4)
A standard invasive maintenance window is scheduled for ACE Production from 10:00 p.m. ET Saturday, August 22 through 4:00 a.m. ET Sunday, August 23, 2026 — plan filings accordingly. The previously reported delays in outbound notifications for Air, Ocean, Rail, Manifest, and In-Bond have been resolved.
ACE Production Standard Invasive Maintenance from 10:00 p.m. ET Saturday, August 22, 2026 to 4:00 a.m. ET Sunday, August 23, 2026
There will be ACE production standard invasive maintenance from 10:00 p.m. ET Saturday, August 22, 2026 to 4:00 a.m. ET Sunday, August 23, 2026.
Resolved – Delays in Outbound Notifications for Air, Ocean, Rail, Manifest, and In-Bond
The delays in outbound notifications for Air, Ocean, Rail, Manifest, and In-Bond have been resolved. Related message: CSMS #69571234 [ https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%...
ACE Certification Standard Invasive Maintenance Window on August 19, 2026 from 5:00 p.m. to 8:00 p.m. ET
There will be an ACE certification standard invasive maintenance window on August 19, 2026 from 5:00 p.m. to 8:00 p.m. ET.
Delays in outbound notifications for Air, Ocean, Rail, Manifest, and In-Bond
CBP is aware trade may be experiencing delays in outbound notifications for Air, Ocean, Rail, Manifest, and In-Bond. CBP is in the process of investigating this matter and will issue a follow-up mess...
General Notice(1)
CBP and the Department of Commerce are hosting a webinar on combating unfair trade — registration is open and brokers with clients in affected industries should consider attending.