19.820—How much time do I have to contest a proposed debarment?
        
        (a) 
         As a respondent you or your representative
 must either send, or make arrangements to appear
 and present, the information and argument to the
 debarring official within 30 days after you
 receive the Notice of Proposed Debarment.
    
    
    
        
        (1) 
         When delivered, if we mail the notice to
 the last known street address, or five days after
 we send it if the letter is undeliverable;
    
    
        
        (2) 
         When sent, if we send the notice by
 facsimile or five days after we send it if the
 facsimile is undeliverable; or
    
    
        
        (3) 
         When delivered, if we send the notice by
 e-mail or five days after we send it if the e-mail
 is undeliverable.