19.425—When do I check to see if a person is excluded or disqualified?
         As an agency official, you must check to see if
 a person is excluded or disqualified before
 you—
    
    
    
    
        
        (c) 
         Approve a lower tier participant if agency
 approval of the lower tier participant is
 required; or
    
    
        
        (d) 
         Approve a principal in connection with a
 lower tier transaction if agency approval of the
 principal is required.