The NAFTA replacement launches under a cloud of disputes, with the U.S. considering new tariffs on Canadian aluminum and growing concerns over Mexico's ability to meet new labor standards in the deal.

Automakers would have until the end of 2020 to fully certify that production plans comply with the new trade pact's rules and U.S. Customs and Border Protection will apply an "informed compliance period" for the first six months of 2021.

Brian Kingston will succeed Mark Nantais as president and CEO of the CVMA.

Modestly higher prices for cars and trucks are a possibility, given the upheaval likely from the agreement's new rules of origin and labour provisions.