ACE Certification Environment Maintenance Window — September 16, 2026, 5–8 p.m. ET
CBP scheduled a standard maintenance window for the ACE Certification (test) environment on September 16, 2026, from 5:00 p.m. to 8:00 p.m. Eastern Time. ACE certification testing will be unavailable during this window.
We treat CBP certification maintenance windows as a scheduling constraint for any integration testing planned around the concurrent CATAIR and Entry Type 13 deployments described in companion CSMS notices.
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