A former spouse is obligated to notify the Department of the following on a timely basis:
    
    
        
        (a) 
         A divorce from a participant or former participant when the former spouse is notified by the court of the divorce before the participant is notified;
     
    
        
        (b) 
         Any change in address; and
     
    
    Notices shall be sent to the Department of State, Attention PER/ER/RET, Washington, DC 20520.