The United States will not renew a North American trade pact with Canada and Mexico in its current state, the US trade envoy said Wednesday, meaning the deal will now be reviewed annually.

While the agreement may survive at the end of negotiations, years of uncertainty, tariffs, and prolonged talks could reshape North American trade.

The USMCA review began on July 1 as Washington declined to extend the pact, starting a decade-long clock that hangs over Mexico, the peso and autos.

USMCA came into effect on July 1, 2020, and is slated to expire after 16 years.