19.400—May I enter into a transaction with an excluded or disqualified person?
        
        (a) 
         You as an agency official may not enter
 into a covered transaction with an excluded person
 unless you obtain an exception under  § 19.120.
    
    
        
        (b) 
         You may not enter into any transaction with
 a person who is disqualified from that
 transaction, unless you obtain a waiver or
 exception under the statute, Executive order, or
 regulation that is the basis for the person's
 disqualification.