CFR›Title 21›Chapter I›Part 556 ContainsSubparts A–BCorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 556—TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD Subparts A Subpart A—General Provisions Sections 556.1–556.5 B Subpart B—Specific Tolerances for Residues of Approved and Conditionally Approved New Animal Drugs Sections 556.34–556.770 Authority21 U.S.C. 342, 360b, 371.Source84 FR 32993, July 11, 2019, unless otherwise noted. Previous 530 Part 530—Extralabel Drug Use in Animals Next 558 Part 558—New Animal Drugs for Use in Animal Feeds