In my experience, this language has always been covered as a standard clause in the Promissory Note. While most consumer loans require the customer to provide financial information at the time of application, there is almost always a clause or provision for the right to collect updated financial information upon some time of trigger event. (delinquency, deterioration of credit or collateral, e.g.) However, I believe this is more of a safety and soundness issue, not a regulation.