This regulation establishes tolerances for residues of prosulfuron in or on grain, cereal, forage, fodder, and straw, group 16, stover; grain, cereal, forage, fodder, and straw, group 16, forage; grain, cereal, forage, fodder, and straw, group 16, hay; grain, cereal, forage, fodder, and straw, group 16, straw; and grain, cereal, group 15. Syngenta Crop Protection, LLC requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).