Harmonized System Update (HSU) 2539

The Harmonized System Update (HSU) 2539 was created on October 31, 2025, and contains 17 Harmonized Tariff records and 38 ABI records.   HSU 2539 includes the Section 232 duties on Medium- and Heavy-Duty Vehicles (MHDVs), Medium- and Heavy-Duty Vehicle Parts (MHDVPs), and buses effective November 1, 2025, pursuant to Presidential Proclamation 10984 [ https://www.whitehouse.gov/presidential-actions/2025/10/adjusting-imports-of-medium-and-heavy-duty-vehicles-medium-and-heavy-duty-vehicle-parts-and-buses-into-the-united-states/ ] issued on October 17, 2025.   For additional guidance on the Section 232 duties on Medium- and Heavy-Duty Vehicles/Vehicle Parts (MHDVPs) and buses please see CSMS #66665333 [ https://content.govdelivery.com/bulletins/gd/USDHSCBP-3f93b75?wgt_ref=USDHSCBP_WIDGET_2 ].   Questions regarding the Section 232 Truck duties effective November 1, 2025, should be directed to traderemedy@cbp.dhs.gov   Questions or concerns with the Harmonized System Update should be directed to the HTS Administrator at HTSadmin@cbp.dhs.gov.   Related Message Number(s): CSMS #66665333.