75.29—When an appeal may be refused.
         A request for an appeal inspection may be refused if:
    
    
    
        
        (b) 
         The quality or condition of the seed has been altered since the inspection covering the seed on which the appeal inspection is requested;
    
    
    
        
        (d) 
         The lot relative to which appeal inspection is requested cannot be positively identified by the inspection as the lot from which drawn samples were  previously inspected in a lot inspection; or