CFR›Title 21›Chapter I›Part 516›Subpart A ContainsSections 516.1–516.3CorpusDaily eCFRDisplayed edition2026-09-22Last updated2026-09-22 Subpart A—General Provisions Sections 516.1 § 516.1 Scope. 516.2 § 516.2 Purpose. 516.3 § 516.3 Definitions. Next B Subpart B—Designation of a Minor Use or Minor Species New Animal Drug