CSMS # 65952024 - ACE Certification Environment – Extended Invasive Maintenance Window August 18, 2025 U.S. Customs and Border Protection sent this bulletin at 08/18/2025 09:36 AM EDT Cargo Systems Messaging Service CSMS # 65952024 - ACE Certification Environment – Extended Invasive Maintenance Window August 18, 2025 The Automated Commercial Environment, or ACE, Certification Environment (CERT) will have an out-of-cycle extended invasive maintenance window on Monday, August 18, 2025, from 5:00p.m. to 9:00p.m. ET.