2400.24—Downgrading.
               		
               	 	
               	 	
               	 	               	 	               	 	               	 	               	 	
               	 	
    
        
        (a) 
         When it will serve a useful purpose, original classification authorities may, at the time of original classification, specify that downgrading of the assigned classification will occur on a specified date or upon the occurrence of a stated event.
     
    
        
        (b) 
         Classified information marked for automatic downgrading is downgraded accordingly without notification to holders.
     
    
        
        (c) 
         Classified information not marked for automatic downgrading may be assigned a lower classification designation by the originator or by an official authorized to declassify the same information. Prompt notice of such downgrading shall be provided to known holders of the information.