Upon direction of the Commission the Executive Director shall, and in all other instances, the Executive Director may require a possible violator to show cause before the Commission why a penalty should not be assessed in accordance with the provisions of these rules and  section 14.17 of the Compact. The notice to the possible violator shall:
    
    
        
        (a) 
         Set forth the date on which the possible violator shall respond; and
     
    
        
        (b) 
         Set forth any information to be submitted or produced by the possible violator.