This regulation establishes a tolerances for residues of iodosulfuron-methyl-sodium, methyl 4-iodo-2-[3-(4-methoxy-6-methyl- 1,3,5 triazin-2-yl)ureidosulfonyl]benzoate, sodium salt, in or on corn, field, grain; corn, field, forage; and corn, field, stover. Aventis CropScience USA LP requested this tolerance under the Federal Food, Drug, and Cosmetic Act, as amended by the Food Quality Protection Act of 1996.