For purposes of this subpart, a “sexually dangerous person” is a person:
    
    
        
        (a) 
         Who has engaged or attempted to engage in:
     
    
        
        (1) 
         Sexually violent conduct; or
     
    
        
        (2) 
         Child molestation; and
     
    
        
        (b) 
         Has been assessed as sexually dangerous to others by a Bureau mental health professional.