CFR › Title 21 › Part 556 › §556.31021 CFR §556.310Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)[Reserved](b)Tolerances. The tolerance for haloxon is:(1)Cattle. Edible tissues (excluding milk): 0.1 ppm.(2)[Reserved](c)Related conditions of use. See §§ 520.1120a and 520.1120b of this chapter.