U.S. Customs and Border Protection has issued CSMS #68253075 providing guidance on the implementation of the April 2, 2026 Proclamation, “Strengthening Actions Taken to Adjust Imports of Aluminum, Steel, and Copper into the United States.” The message outlines which goods and their contents are subject—or not subject—to the duties imposed by the Proclamation, provides an aggregate‑weight example for determining whether a derivative article is covered, and discusses goods specified in the annexes to the Proclamation.
CSMS: https://content.govdelivery.com/bulletins/gd/USDHSCBP-4117593?wgt_ref=USDHSCBP_WIDGET_2