CSMS #48505331 - ACE Certification Standard Invasive Maintenance Window on 06/16/2021 from 5:00pm to 8:00pm EST U.S. Customs and Border Protection sent this bulletin at 06/15/2021 04:40 PM EDT Cargo Systems Messaging Service CSMS #48505331 - ACE Certification Standard Invasive Maintenance Window on 06/16/2021 from 5:00pm to 8:00pm EST There will be ACE Certification Standard Invasive Maintenance Window on 06/16/2021 from 5:00pm to 8:00pm EST.