Notification obligation. Unless a covered institution has determined, after a reasonable investigation of the facts and circumstances of the incident of unauthorized access to or use of sensitive customer information that occurred at the covered institution or one of its service providers that is not itself a covered institution, that sensitive customer information has not been, and is not reasonably likely to be, used in a manner that would result in substantial harm or inconvenience, the covered institution must provide a clear and conspicuous notice, or ensure that such notice is provided, to each affected individual whose sensitive customer information was, or is reasonably likely to have been, accessed or used without authorization. The notice must be transmitted by a means designed to ensure that each affected individual can reasonably be expected to receive actual notice in writing.