CFR › Title 21 › Part 556 › §556.16521 CFR §556.165Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)[Reserved](b)Tolerances. The tolerance for cloxacillin is:(1)Cattle. Edible tissues: 0.01 ppm.(2)[Reserved](c)Related conditions of use. See §§ 526.464 and 526.465 of this chapter.