Mr. Chair, the underwriting decisions—and that is an underwriting decision—are decisions for the banks, but we're not disinterested in those. We have a principles-based regulation system. We do not assign the banks rules but we assign the principles and expectations we expect them to meet.
We do that primarily through something called guideline B-20, which sets out the principles we expect the banks to adhere to when they underwrite residential mortgages. The question you pose is the question we expect them to address when underwriting each and every mortgage, and then usually annually we have a special conversation with lenders and ask them how they are doing on those expectations.