CFR › Title 21 › Part 556 › §556.41021 CFR §556.410Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)[Reserved](b)Tolerances. The tolerance for metoserpate is:(1)Chickens. Edible tissues (excluding eggs): 0.02 ppm.(2)[Reserved](c)Related conditions of use. See § 520.1422 of this chapter.