CSMS # 65962695 - ACE Certification Extended Invasive Maintenance Window – August 20, 2025 U.S. Customs and Border Protection sent this bulletin at 08/19/2025 09:15 AM EDT Cargo Systems Messaging Service CSMS # 65962695 - ACE Certification Extended Invasive Maintenance Window – August 20, 2025 The ACE Certification Environment (CERT) will have an out-of-cycle extended invasive maintenance window on Wednesday, August 20, 2025, from 5:00 p.m. to 10:00 p.m. ET.