4 For U.S. Grade AA at destination, at least 10 percent must be A quality or better.5 For U.S. Grade AA and A at origin and destination within the tolerances permitted for B quality, notmore than 1 percent may be B quality due to air cells over 3/8 inch, blood spots (aggregating not more than 1/8 inchin diameter), or serious yolk defects.6 For U.S. Grades AA and A Jumbo size eggs, the tolerance for Checks at origin and destination is 7percent and 9 percent, respectively.Table II -- Tolerance for Individual Case Within a Lot