U.S. Customs and Border Protection (CBP) has notified trade participants that the Automated Commercial Environment (ACE)—the backbone system for submitting advance cargo manifests, carrier entries, and Foreign Trade Zone admissions—will undergo “standard invasive maintenance” from 22:00 ET on Saturday, 26 September through 04:00 ET on Sunday, 27 September 2026. During the six-hour window, carriers, customs brokers and logistics providers may experience intermittent outages when filing air, ocean and truck manifests or querying entry status. Although CBP will queue incoming data, real-time responses will be delayed until systems are fully restored. The agency recommends that airlines submit Passenger Name Records (PNRs) and Advance Passenger Information System (APIS) data well ahead of departure times to avoid last-minute boarding denials. For corporate mobility departments, the risk is two-fold: delayed cargo needed for expatriate moves and potential hiccups when chartering private or corporate shuttle flights that rely on APIS confirmation numbers. Companies moving time-sensitive medical, automotive, or semiconductor shipments should build extra buffer into transit schedules and have contingency routing in place. CBP says the maintenance is necessary to install security patches ahead of the peak holiday shipping rush and to align ACE modules with forthcoming biometric exit pilots. The work falls outside normal business hours to minimise disruption, but previous “invasive” windows have occasionally over-run their scheduled finish by 30–60 minutes. Global logistics teams should monitor the Cargo Systems Messaging Service (CSMS) for real-time bulletins and be prepared to file paper back-up manifests if absolutely required—though most ports of entry will accept them only in emergency scenarios.
