There’s no public information on this yet. Given that there are vaccination programs is moving along finally, it may be good by summer.
My guess would be mid summer, and to begin with only with proof of vaccination and/or negative test.
Given the importance of tourism to our economy, and the way that has been ravaged, we’re all crossing our fingers. But vaccination up here will probably not be done until early 2022, and as long as we are vulnerable, governments will be shy to let others in.
My source is no longer with the border services agency.