: A 25 per cent US tariff on medium and heavy-duty trucks and a 10 per cent duty on buses took effect Saturday, following President Donald Trump ‘s administration’s investigation into national security risks from these imports.

“Products subject to tariffs under this proclamation will not be subject to additional or existing sectoral tariffs on steel, aluminium, copper, automobiles and automobile parts, and lumber,” the White House said in a statement.

President Trump started the investigations, under the authority of the Trade Expansion Act of 1962, to impose tariffs on various categories of goods in efforts to boost domestic manufacturing and punish countries deemed to be taking advantage of the United States.

The move is “vital for America’s military readiness, emergency response c

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