Canada and CBSA have NO ROLE in explaining or enforcing U.S. border controls. NO ROLE in explaining or enforcing U.S. traveler restrictions related to covid-19.
If and when a Canadian traveler arrives at a land crossing PoE, the Canadian (whether a citizen or Permanent Resident) is entitled to enter Canada. Currently most (there are exceptions) are then subject to a mandatory 14 day quarantine IN Canada upon being allowed to enter Canada. This is not affected by any rules applicable to travelers in the U.S.
In particular . . .
There is NO National quarantine restriction in the U.S. applicable to arriving international travelers generally.
There are restrictions applicable to travelers from certain countries, or who have been in certain countries within a specified time period, but last I looked these were bars to entry not quarantine restrictions. That is, if a traveler has been in one of the prescribed countries recently, that traveler is not be allowed to enter the U.S.
Many individual states in the U.S. have their own quarantine restrictions for travelers. Not sure how these are enforced since there are few (very few) state-based border control stations.
EVEN IF the U.S. had a quarantine requirement, that would NOT be any business of CBSA. Canada does not have any role in the border control done by foreign countries. CBSA would have NOTHING to do with whether or not there is a quarantine in the U.S. And CBSA would have NO role in enforcing any such quarantine.
If and when a Canadian traveler arrives at a land crossing PoE, the Canadian (whether a citizen or Permanent Resident) is entitled to enter Canada. Currently most (there are exceptions) are then subject to a mandatory 14 day quarantine IN Canada upon being allowed to enter Canada. This is not affected by any rules applicable to travelers in the U.S.
In particular . . .
Believe you still have to meet the 14 day stay requirement in the US before you can enter Canada.
I recently came back to Canada via the USA from my country. I did not find a requirement to stay in the USA for 14 days before coming to Canada on either government's website. I arrived to New York from my country on Saturday. On Sunday morning I flew to Burlington, took a taxi to the Canadian border. The officer asked me about my trip, let me in, I obviously had to go onto self-isolation in Canada. This was thoroughly monitored. But no questions were asked about 14 day quarantine in the US.
The CBSA agent made an error.
There is NO National quarantine restriction in the U.S. applicable to arriving international travelers generally.
There are restrictions applicable to travelers from certain countries, or who have been in certain countries within a specified time period, but last I looked these were bars to entry not quarantine restrictions. That is, if a traveler has been in one of the prescribed countries recently, that traveler is not be allowed to enter the U.S.
Many individual states in the U.S. have their own quarantine restrictions for travelers. Not sure how these are enforced since there are few (very few) state-based border control stations.
EVEN IF the U.S. had a quarantine requirement, that would NOT be any business of CBSA. Canada does not have any role in the border control done by foreign countries. CBSA would have NOTHING to do with whether or not there is a quarantine in the U.S. And CBSA would have NO role in enforcing any such quarantine.