President Donald J. Trump modified the additional ad valorem duties (percentage-based import tariffs) imposed on certain Canadian products under Proclamation 11048. From 12:01 a.m. eastern time on September 15, 2026, goods listed in Annex I, Part A will remain subject to the 50% duty, while products listed in Part B will no longer face that additional charge. The changes will apply alongside duties imposed under section 232 of the Trade Expansion Act of 1962. The proclamation says Canada reneged on a commitment to remove discrimination against U.S. commerce, causing a three-day suspension to lapse on August 22, 2026. It also modifies the Harmonized Tariff Schedule of the United States (HTSUS), with U.S. Customs and Border Protection authorized to issue implementation rules and make necessary technical changes.