It is intentionally not defined in the legislation, as I said, to allow maximum flexibility for the government to respond in a range of unforeseen circumstances that threaten the public interest. When we say “unforeseen circumstances”, obviously, I can't predict each and every circumstance, which is why we are here to put that measure in.
It is to protect the public interest, including but not limited to protecting the integrity of the immigration system, protecting the safety, security and health of Canadians and the security of our border, and responding to large-scale emergencies or other unforeseen scenarios. Each use of these authorities would be decided by the Governor in Council after considering all relevant factors, including the potential impact on vulnerable people, as well charter considerations.
To ensure public transparency, each order in council is published in the Canada Gazette, which would give all of that information.