This regulation establishes a tolerance for residues of the fungicide, dimethomorph, (E,Z) 4-[3-(4- chlorophenyl)-3-(3,4-dimethoxyphenyl)-1-oxo-2-propenyl] morpholine in or on brassica, head and stem, subgroup 5A. The Interregional Research Project No. 4 (IR-4), 500 College Road East, Suite 201 W, Princeton, NJ 08540 requested this tolerance under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA).