Auto parts imported to the U.S. under North American free trade rules will continue to be exempted — for now — from new tariffs on heavier-duty trucks and components set to go into effect next month, the White House said Friday.

U.S. President Donald Trump signed the new trade proclamation aboard Air Force One that expands his 25 per cent auto tariffs to cover medium and heavy-duty trucks and parts. It also sets a 10 per cent duty for imported transit and school buses, as well as motorcoaches.

The tariffs go into effect Nov. 1.

The proclamation makes official what Trump announced earlier this month on his Truth Social website.

A White House fact sheet on the policy said truck parts compliant with the Canada-U.S. Mexico Agreement on free trade (CUSMA) will continue to be exempt from

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