423.665—Notice and effect of hearing decision.
        
        (a) 
         As soon as practical after the close of the hearing, the hearing officer issues a written decision that—
    
    
    
    
    
        
        (c) 
         The hearing decision is final and binding unless it is reversed or modified by the Administrator following review under  § 423.666, or reopened and revised in accordance with  § 423.668.