President Donald Trump said Monday that all medium- and heavy-duty trucks imported into the US will face a 25% tariff starting November 1, according to Reuters. Last month, Trump announced that heavy truck imports would be subject to new duties beginning October 1 on national security grounds, stating the tariffs were intended to protect manufacturers from "unfair outside competition." Under trade agreements with Japan and the EU, the US has agreed to a 15% tariff on light-duty vehicles, but it remains unclear whether that rate will apply to larger vehicles. The Trump administration has also allowed manufacturers to deduct the value of U.S.-made components when calculating tariffs on light-duty vehicles assembled in Canada and Mexico. The affected larger vehicles include delivery trucks, garbage trucks, utility trucks, transit and shuttle buses, school buses, tractor-trailers, semi-trucks, and other heavy-duty vocational vehicles.