There were in fact many changes at the border. The Canada Border Services Agency worked with the Canada Public Health Agency to develop guidelines for border agents, but the rules kept changing as the pandemic progressed.
Our recommendation included not only better training, but also better monitoring in terms of applying the rules. The agents have supervisors, and it is at this level that better monitoring to ensure consistency would have been useful during the pandemic.
It's probably very hard to train people in the middle of a pandemic, but it's important to find other options for doing so. What I have in mind here is monitoring and surveillance. That's why we came up with that particular recommendation.