CSMS #68855869 · GUIDANCE: Further Adjusting the Tariff Regimes for Imports of Aluminum, Steel, and Copper Into the United States

Brief takeaway: The notice provides CBP guidance on a June 1, 2026 Proclamation that further adjusts Section 232 tariff treatment for steel, aluminum, and copper imports, including adding new derivatives and reducing rates for others.

What changed: According to the notice, the President issued Proclamation 11032 on June 1, 2026, amending the earlier Proclamation 11021, which had imposed 10-50% additional duties on the full customs value of certain metal articles and derivatives from all countries effective April 6, 2026. The notice states that Proclamation 11032 adds new metals derivatives subject to Section 232 duties and reduces the Section 232 duty rates for other derivatives (see 91 FR 34085).

Who's affected: The notice cites steel, aluminum, and copper articles and their derivatives from all countries, filed under HTSUS provisions referenced in the guidance. Specific derivative HTS codes and the exact revised rates are not fully reproduced in the text provided here.

What to review:
- Review whether your steel, aluminum, or copper products or derivatives may fall within the categories the notice references.
- Check the full Proclamation 11032 text and 91 FR 34085 for the newly added derivatives and revised duty rates.
- Confirm with your broker which HTSUS headings and reporting instructions may apply to your entries.
- Review the effective date and any entry-submission requirements described in the CBP guidance.

This is general information, not legal advice and not a compliance determination — confirm specifics with a licensed customs broker or trade counsel.