CSMS #49029654 - ACE Certification Standard Invasive Maintenance Window on 08/11/2021 from 5:00pm to 8:00pm EST U.S. Customs and Border Protection sent this bulletin at 08/10/2021 01:14 PM EDT Cargo Systems Messaging Service CSMS #49029654 - ACE Certification Standard Invasive Maintenance Window on 08/11/2021 from 5:00pm to 8:00pm EST There will be an ACE Certification Standard Invasive Maintenance Window on 08/11/2021 from 5:00pm to 8:00pm EST.