CSMS #50174219 - Updated ACE Cargo Release Input Validation Rules document is available. U.S. Customs and Border Protection sent this bulletin at 11/23/2021 12:12 PM EST Cargo Systems Messaging Service CSMS #50174219 - Updated ACE Cargo Release Input Validation Rules document is available. The ACE Cargo Release Input Validation Rules document has been updated. The update includes the addition of a new error code which prevents IOR changes on an SE Update transaction.