CFR›Title 7›Subtitle B›Chapter I›Part 28›Subpart A›Subject Group Definitions ContainsSections 28.1–28.2CorpusDaily eCFRDisplayed edition2026-05-07Last updated2026-05-07 Sections 28.1 § 28.1 Meaning of words. 28.2 § 28.2 Terms defined. Previous Classification Classification Next Drawing, Submission and Disposition of Samples Drawing, Submission and Disposition of Samples