On August 16, 2017, U.S. Customs and Border Protection (CBP) published in the Federal Register a general notice announcing that as of September 16, 2017, the Automated Commercial Environment (ACE) will be the sole electronic data interchange (EDI) system authorized by the Commissioner of CBP for processing electronic duty deferral entry and entry summary filings. After September 16, 2017, the Automated Commercial System (ACS) will no longer be a CBP-authorized EDI system for processing these filings.

On August 30, 2016, CBP published a notice in the Federal Register announcing plans to make ACE the sole EDI system authorized by the Commissioner for processing electronic drawback and duty deferral entry and entry summary filings. The date for the changes announced in that notice had been delayed indefinitely. This notice announces the new date for the transition of duty deferral entry and entry summary filings. The transition for processing electronic drawback filings will be announced in the Federal Register at a later date.