CSMS & Rulings
Every CBP bulletin and CROSS ruling, indexed and searchable. No account required.
Last updated Aug 16, 2026
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CSMSCSMS 69271650 · Jul 17, 2026 · 232, ACE ops
New Validation for Import Adjustment Offset for Section 232 Duties for Automobile and Medium and Heavy-Duty Vehicle Parts to Deploy July 18, 2026 – ACE CATAIR Error Dictionary Updated
CBP announces a new ACE validation deploying July 18, 2026 for import adjustment offsets related to Section 232 duties on automobile and medium/heavy-duty vehicle parts, with updates to the ACE CATAIR Error Dictionary adding new error codes for auto part credit processing.
CSMSCSMS 69252300 · Jul 15, 2026 · 232, ACE ops
GUIDANCE: Section 232 Copper Smelt and Cast Reporting Requirements
CBP provides guidance and ACE reporting instructions for new Section 232 requirements to report the countries of smelt and cast on certain copper article imports, effective July 30, 2026, including new CATAIR data elements and error codes.
CSMSCSMS 68855869 · Jun 5, 2026 · 232
GUIDANCE: Further Adjusting the Tariff Regimes for Imports of Aluminum, Steel, and Copper Into the United States
CBP provides guidance implementing the June 1, 2026 Proclamation adjusting Section 232 tariff regimes for aluminum, steel, and copper imports, detailing new derivative articles subject to duties, modified duty rates, and effective dates for various HTSUS Chapter 99 provisions.
CSMSCSMS 68762890 · May 27, 2026 · 232, drawback
GUIDANCE: Implementation of Certain Tariff-Related Elements of the Trade and Security Agreement Between the Taipei Economic and Cultural Representative Office and the American Institute in Taiwan
CBP provides guidance implementing tariff-related elements of a US-Taiwan Trade and Security Agreement, modifying Section 232 duty rates for certain aircraft components, automobile parts, and wood products of Taiwan effective May 1, 2026, and clarifies drawback availability and exclusions from certain additional duties.