On the evening of September 8, 2026, President Trump announced three proclamations excluding certain Canadian imports from entering the U.S. under Section 338 authority, along with two modifications to existing Section 338 tariffs on Canadian goods.

1. Import Exclusions

    Import Exclusions come effective on September 29, 2026, at 12:01 a.m. ET. Three proclamations bar entry of specific Canadian-origin goods in these categories.

    1. Motor vehicles
    2. Dairy products
    3. Alcoholic beverages

    The specific HTS exclusions can be found in the Annex to each proclamation.

    2. Tariff Modifications

    Tariff Modifications come effective on September 15, 2026, at 12:01 a.m.

    Modifications to Section 338 tariffs apply to motor vehicles and alcoholic beverages. Separately, the July 20 action was revised to remove products such as rock salt and cement from scope, replacing them with new items ranging from ATVs to additional dairy products. Specific amendments can be found in the Annexes below:

    1. Motor vehicles
    2. Alcoholic beverages
    3. Dairy products

    3. Canada’s Retaliatory Tariffs

    Canada announced retaliatory tariffs that in effect as of September 8, 2026.

    Canada imposed counter-tariffs of up to 50% on U.S. products worth $27.6 billion targeting steel, dairy, appliances, agricultural equipment, pulp & paper, and electronics. This was in response to the U.S.’s Aug. 22 decision to impose 50% Section 338 tariffs on $27.6 billion of Canadian goods.

    Further details can be found in the fact sheet.

    Shapiro will monitor for updates.