I have not been to Niagara Falls. I was in Vancouver last week and actually saw it in operation, both in the NEXUS lanes and in traditional crossing lanes.
On the need to verify people's vaccination status to determine whether or not they need to quarantine, whether or not they can enter under the orders in council, by receiving the pre-submission our officers have that information validated technologically and presented to them at the border. If people had to do it—and there was a period of time when we did ask them to actually show us their vaccination certificates—