U.S. Drug Enforcement Agency Implementation Guide Moved from Draft Section of CBP.gov

The U.S. Drug Enforcement Agency (DEA) Implementation Guide (IG) can now be found in the “Implementation Guidelines: Ready for Coding” section of CBP.gov: https://www.cbp.gov/trade/automated/catair
The DEA message set was deployed to Customs and Border Protection’s Automated Commercial Environment (ACE) Production Environment on March 21, 2026. The new DE3 flag is being enforced with a WARNING severity (see CSMS 67396599 [ https://content.govdelivery.com/accounts/USDHSCBP/bulletins/40463f7 ]).
*NOTE: The enforcement of the DE3 flag will change to a REJECT severity on May 4, 2026 (this date is a change from the date given in CSMS 67396599 [ https://content.govdelivery.com/accounts/USDHSCBP/bulletins/40463f7 ]).*
For questions about the DEA IG, please contact DEA at: DRI@dea.gov.
For questions about this CSMS, please contact: CREM@cbp.dhs.gov.
"Related Messages: 67396599, 68034342"