2400.43—Heads of offices.
         The Head of each unit is responsible for the administration of this regulation within his area. These responsibilities include:
    
    
    
        
        (b) 
         Exercising a continuing records review to reduce classified holdings through retirement, destruction, downgrading or declassification;
    
    
    
        
        (d) 
         Issuing appropriate internal security instructions and maintaining the prescribed control and accountability records on classified information under their jurisdiction.