For more information regarding the changes, please see the DDTC notice published in the Federal Register (82 FR 15): https://www.pmddtc.state.gov/FR/2017/82FR15.pdf
Beginning December 31, 2016, when declaring permanent or temporary exports and/or temporary imports of defense articles controlled by the U.S. Munitions List (USML), traders will input data relevant to DDTC in CBP’s electronic system(s). CBP will transmit the relevant shipment details to DDTC via an electronic data exchange, eliminating the need for traders to notify DDTC separately.
To download an Adobe copy of this Final Rule please follow this link: DDTC Final Rule