CFR›Title 21›Chapter I›21 CFR Part 171 Citation21 CFR Part 171ContainsSubparts Subpart A–Subpart BCorpusDaily eCFRDisplayed edition2026-09-15Last updated2026-09-15 PART 171—FOOD ADDITIVE PETITIONS Subparts Subpart A Subpart A—General Provisions Subpart B Subpart B—Administrative Actions on Applications Authority21 U.S.C. 321, 342, 348, 371.Source42 FR 14489, Mar. 15, 1977, unless otherwise noted.