WASHINGTON - U.S. President Donald Trump signed a proclamation Friday to slap a 25 per cent tariff on imported medium- and heavy-duty trucks beginning Nov. 1, with a carveout for vehicles traded under the Canada-U.S.-Mexico Agreement.

Trucks compliant with the trade agreement, better known as CUSMA, will be tariffed only on their non-American parts.

The latest levies will not hit auto parts that are compliant under the North American trade pact for now. A fact sheet from the White House said that exemption will be in place until Commerce Secretary Howard Lutnick, in consultation with U.S. Customs and Border Protection, establishes a process to apply tariffs to the non-U.S. content of the parts.

A 10 per cent tariff will be placed on buses and motorcoaches.

The administration also inclu

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