As of February 21st, 2021, at 11:59:59 PM, it will be required for all travellers to submit their information electronically before or when entering Canada. Commercial transporters will continue to be able to submit the mandatory information before or when entering Canada. For travellers who have not submitted their information in advance, they will be asked to provide it on entry. No Canadian driver will be denied entry into the country.
So in summary: truck drivers, for the time being, will have three options to comply: (i) ArriveCan App (ii) Web Portal (iii) oral declaration. However, the oral declaration is only being allowed to facilitate the movement of cross-border trade until a reasonable transition timeframe has elapsed, which is still to be determined. CTA will be working closely with its members and CBSA on this transition timeframe.