CFR › Title 21 › Part 556 › §556.70021 CFR §556.700Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)[Reserved](b)Tolerances. The tolerances for sulfomyxin are:(1)Chickens and turkeys. Edible tissues (excluding eggs): Zero.(2)[Reserved](c)Related conditions of use. See § 522.2340 of this chapter.