Failure to redress investor grievances triggers mandatory penalties when entities ignore the Board's written directive within the specified timeframe. Liability for failure to redress investors' grievances attaches where a listed company or registered intermediary, after being called upon by the Board in writing (including by electronic communication), fails to redress such grievances within the time specified by the Board; the provision imposes a mandatory monetary penalty calculated on a continuing daily basis during the period of non-redress, subject to an overall maximum cap.