63.1. A nurse who refuses to allow the client access to personal information concerning the client because its disclosure would be likely to reveal personal information about a third party or the existence of such information, and the disclosure would be likely to cause serious harm to the third party, unless the third party agrees to its communication, or in an emergency in which the life, health or safety of the person concerned is endangered, shall notify the client accordingly in writing, with her or his grounds for refusing, and inform the client of his or her recourse.