To clarify, the 30 days is outlined in customs tariff item 9802, which outlines the conditions under which a resident of Canada may temporarily import a vehicle. The conditions are up to 30 days. The vehicle would have to be exported solely for going from the port of entry to point A, and then from point A back to the port of entry. By using the car while in Canada for leisure purposes or for transportation of goods or carrying.... If you were a Uber driver and you were carrying folks around, you would be in violation of the conditions in the customs tariff.
On May 9th, 2019. See this statement in context.