This regulation establishes tolerances for residues of isoxaben in or on apple, the bushberry subgroup 13-07B, the tree nut group 14-12, and the small vine climbing fruit (except fuzzy kiwifruit) subgroup 13-07F. Interregional Research Project Number 4 (IR-4) requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).