ACE will enforce new drawback validations for eligible Section 232 auto/truck parts under 1313(a)/(b), limiting claims to specific HTS and dates.
CBP is implementing new ACE drawback validations tied to Proclamation 10984 for Section 232 tariffs on medium- and heavy-duty vehicles and parts. For 1313(a)/(b) claims, only specific eligible Section 232 auto and truck parts HTS can be used, and claims must meet date and HTS pairing rules. No tariff rates change, but drawback eligibility and claim validation do, effective for claims dated on/after November 1, 2025, with production deployment April 21, 2026.
CBP has announced new ACE drawback error validations in support of Presidential Proclamation 10984, which adjusts imports of medium- and heavy-duty vehicles, related parts, and buses under Section 232. These validations affect how drawback may be claimed on specific eligible Section 232 tariffs for auto parts and truck parts under 19 U.S.C. 1313(a) (manufacturing direct identification) and 1313(b) (manufacturing substitution).
There is no change to the underlying Section 232 duty rates or HTS classifications in this CSMS. However, the ability to recover those duties via drawback is being constrained and system-enforced. ACE will now allow drawback claims only for the specific eligible Section 232 HTS numbers identified under Proclamation 10984 and will prevent overclaimed refunds tied to ineligible Section 232 tariffs or excessive claim amounts.
Two new ACE error codes are introduced. Error FD12 will be returned when a drawback claim under 1313(a) or 1313(b) has a claim date earlier than November 1, 2025. This effectively sets November 1, 2025 as the earliest acceptable claim date for drawback on these particular Section 232 duties. Claims with earlier claim dates will be rejected by ACE for these provisions.
Error FD13 will be returned when a 1313(a) or 1313(b) drawback claim fails either of two conditions: (1) the claim does not report both the eligible Section 232 HTS number and the corresponding Chapter 1–97 HTS number, and/or (2) the requested drawback amount exceeds the available Section 232 duty on the relevant entry summary line. This forces filers to correctly pair the special Section 232 HTS with the base tariff HTS and to cap the drawback amount at the actual Section 232 duty paid.
For customs brokers and trade compliance teams handling drawback, this means you must: identify which auto and truck parts HTS are designated as eligible Section 232 tariffs under Proclamation 10984; ensure drawback claims under 1313(a)/(b) for these duties use a claim date of November 1, 2025 or later; program ABI and internal systems to transmit both the eligible Section 232 HTS and the Chapter 1–97 HTS on each applicable drawback line; and validate that claimed drawback amounts do not exceed the Section 232 duty available on the entry summary line.
The new validations are already available in the ACE Certification environment as of March 17, 2026 for testing and will be deployed to ACE Production on April 21, 2026. Drawback filers should use the CERT environment to test their systems against error codes FD12 and FD13 and adjust mapping, logic, and controls accordingly. The updated ACE Drawback Error Dictionary V38 Draft, available via the CATAIR page, provides technical details on these errors and should be reviewed by IT and compliance teams. While this CSMS does not alter tariff rates, it directly affects how Section 232 duties on certain auto and truck parts can be recovered, so drawback procedures and validations must be updated before the April 21, 2026 production go-live.