The Bureau of the Census issued
a final rule that will require, as of August 18, 2003, all shipper's export declarations (SEDs) for items on the Commerce Control List (CCL) or the United States Munitions List (USML) to be filed electronically by means of the Automated Export System (AES). For those items regarding which the SED has been filed via AES, carriers are not required to attach a paper copy of the SED to the manifest filed with the Bureau of Customs
and Border Protection upon departure. Rather, the manifest should include the transaction identification number or unique identifier to identify the electronic AES record. This number is to be obtained from the shipper.
Source: HK Law