On July 28, 2016, U.S. Customs and Border Protection (CBP) published in the Federal Register a general notice announcing that the Automated Commercial Environment (ACE) Protest Module will be the sole method authorized by the Commissioner CBP for filing electronic protests. This document also announces that CBP will no longer accept protests filed through the Automated Broker Interface (ABI) to the Automated Commercial System (ACS). On August 29, 2016, the effective date of this notice, ACE will replace ACS as the electronic data interchange system authorized for protest filing. This transition has no effect on filers who intend to submit their protest in paper form, as specified in 19 C.F.R. part 174.