CSMS Weekly Digest: Nov 1 - Nov 7, 2025

Weekly summary of 4 CSMS messages from U.S. Customs and Border Protection.

4Total Messages

Tariff(1)

CBP has released Harmonized System Update 2539, which customs brokers should review for any classification changes affecting their clients' commodities.

CSMS #66727301Nov 5

Harmonized System Update (HSU) 2539

The Harmonized System Update (HSU) 2539 was created on October 31, 2025, and contains 17 Harmonized Tariff records and 38 ABI records. HSU 2539 includes the Section 232 duties on Medium- and Heavy-D...

TariffMedium

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.

CSMS #66714741Nov 4

Enhanced ACE Portal Account Application Now Available – Deployment Support Call set for November 5

On October 30, 2025, U.S. Customs and Border Protection (CBP) automated the process for applying for a new Automated Commercial Environment (ACE) Secure Data Portal (ACE Portal) top account with the I...

System UpdateMedium

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.

CSMS #66729084Nov 5

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.

System MaintenanceMedium

CSMS #66718148Nov 4

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.