This document announces U.S. Customs and Border Protection’s (CBP’s) plan to conduct a National Customs Automation Program (NCAP) test to assess new functionalities related to the electronic filing and processing of protests and new notification procedures for protests filed electronically in the Automated Commercial Environment (ACE). During the test, participants will be able to submit additional arguments and supporting information electronically, with their electronic protest in ACE. In addition, participants will be able to submit requests for further review, requests for accelerated disposition, requests to set aside denial of further review, and requests to void denial of a protest electronically in ACE. This notice also announces the testing of electronic protest status notifications from CBP. The test will be known as the ACE Protest Test.