Thats the thing the CBSA person told me same process at land and airport:Hi RyeCatcher,
I read the same many conflicting replies in different groups from CBSA land border agents. I think its best if we fly for landing purpose. When I called Niagara falls - Peace bridge, the agent said that they won't process COPR and that I will have to return back.
Will allow you can enter Canada with the COPR
But will not do the landing process.
IRCC will contact you regarding finishing the landing process
I suspect a change in policy is coming :|