On August 3, 2023, in Cargo Systems Messaging Service (CSMS) #57200623, U.S. Customs and Border Protection announced the migration of additional functionality to the modernized Automated Commercial Environment (ACE) Portal. The new functionality includes the ability to create and edit basic account data for certain account types, and the ability to create and edit supporting data for certain account types.
CSMS #57200623 can be found here:
https://content.govdelivery.com/bulletins/gd/USDHSCBP-368cfef?wgt_ref=USDHSCBP_WIDGET_2
More information on the ACE Portal Modernization, including the schedule, can be found here:
https://www.cbp.gov/trade/automated/ace-portal-modernization