CSMS Weekly Digest: Nov 1 - Nov 7, 2025
Weekly summary of 4 CSMS messages from U.S. Customs and Border Protection.
Tariff(1)
CBP has released Harmonized System Update 2539, which customs brokers should review for any classification changes affecting their clients' commodities.
System Update(1)
An enhanced ACE Portal account application is now available, with a deployment support call scheduled for November 5 to assist users with the new features.
System Maintenance(2)
Plan for ACE system downtime during two maintenance windows: ACE Certification will be unavailable November 5 from 5-8 p.m. ET, and ACE Production will be down November 8-9 from 10 p.m. to 4 a.m. ET.
ACE Production Standard Invasive Maintenance from 10:00 p.m. ET Saturday, November 8, 2025 to 4:00 a.m. ET Sunday, November 9, 2025
There will be ACE production standard invasive maintenance from 10:00 p.m. ET Saturday, November 8, 2025, to 4:00 a.m. ET Sunday, November 9, 2025.
ACE Certification Standard Invasive Maintenance Window on November 5, 2025 from 5:00 p.m. ET to 8:00 p.m. ET
There will be an ACE certification standard invasive maintenance window on November 5, 2025, from 5:00 p.m. ET to 8:00 p.m. ET.