U.S. Grade B or U.S. 90 Score butter conforms to the following: Possesses a fairly pleasing butter flavor. May possess any of the following flavors to a slight degree:  Lipase, malty, musty, neutralizer, scorched, utensil, weed, whey, and woody. May possess any of the following flavors to a definite degree: Aged, bitter, coarse-acid, smothered, storage, and old cream; feed flavor to a pronounced degree. The permitted total disratings in body, color, and salt characteristics are limited to one-half (1/2), except when the flavor classification is AA, a disrating total of one and oner-half (1-1/2) is permitted, and when the flavor classification is A, a disrating total of one (1) is permitted.