HSU 2607 updates HTS/ABI for Section 232 aluminum, steel, and copper duties effective April 6, 2026; brokers must use updated records.
CBP’s HSU 2607 implements HTS/ABI updates tied to revised Section 232 duties on aluminum, steel, and copper imports effective April 6, 2026. While specific HTS lines and rates are not listed in the CSMS, the update modifies 116 tariff records to align with the new proclamation. Brokers and importers must ensure entries for covered metals use the updated HTS/Chapter 99 and Section 232 duty provisions as reflected in HSU 2607 and related guidance.
CSMS #68290408 announces Harmonized System Update (HSU) 2607, created April 5, 2026, which modifies 116 harmonized tariff records and 519 ABI records. The key trade‑compliance impact is that this HSU implements updates related to Section 232 duties on imports of aluminum, steel, and copper, effective April 6, 2026.
Although the CSMS does not list specific HTS numbers or duty percentages, it explicitly ties the HSU to the presidential proclamation “Strengthening Actions Taken to Adjust Imports of Aluminum, Steel and Copper into the United States” and to CSMS #68253075. Those documents will contain the operative details: which HTS subheadings and Chapter 99 provisions are affected, any new or revised additional duty rates, and any changes in country/product coverage or exclusions.
For customs brokers and trade compliance teams, this is directly relevant to duty calculation. Entries for covered aluminum, steel, and copper products filed on or after April 6, 2026 must use the updated HTS and ABI data. This may include new or revised Chapter 99 numbers for Section 232, changes in eligibility for exemptions or quotas, and updated additional duty rates. Systems that rely on static HTS tables must be refreshed with HSU 2607 to avoid miscalculation of Section 232 duties or rejection of entries.
The bulletin also notes changes to Partner Government Agency (PGA) HTS flags: EPA removed and added several EP5, EP7, and one EP6 flag, and FDA changed the tariff flag from FD3 to FD2 for HTS 3001.90.0150. These PGA flag changes affect data and document requirements but do not alter duty rates. They are operationally important but not directly related to tariff calculation.
Required actions: (1) ensure your ABI/entry software incorporates HSU 2607 as of April 6, 2026; (2) review the referenced proclamation and CSMS #68253075 to identify specific HTS and Chapter 99 changes and any new Section 232 duty rates or treatments for aluminum, steel, and copper; (3) update internal classification guidance and broker instructions for affected commodities; and (4) verify that entries for these metals correctly declare any applicable Section 232 Chapter 99 numbers and calculate additional duties accordingly.