CFR›Title 21›Chapter I›Part 155›Subpart A›21 CFR 155.1 Citation21 CFR 155.1CorpusDaily eCFRDisplayed edition2026-10-14Last updated2026-10-14 § 155.1 xxxLink to an amendment published at 91 FR 65065, Oct. 13, 2026. Next 155.3 § 155.3 Definitions.