ACE Manifest :
Customs Border Protection (CBP) now requires all carriers to submit electronic manifests through their Automated Commercial Environment (ACE). The Automated Commercial Environment (ACE) is the U.S. Customs and Border Protection shipment reporting regulation! Highway carriers are required to send crew, trucks, trailer and shipment details over the Internet to U.S. & Canada Customs before reaching the border. Carriers are required to submit electronic manifests and have them accepted by U.S. & Canada Customs one hour in advance of truck arrival at first port of entry.