CSMS #46014092 - Delay's in ACE Import Manifest Processing. U.S. Customs and Border Protection sent this bulletin at 02/01/2021 11:39 AM EST Cargo Systems Messaging Service CSMS #46014092 - Delay's in ACE Import Manifest Processing. There is currently a delay in ACE Import Manifest Processing. Another CSMS message will be issued when the message backlog is cleared.