CFR›Title 7›Subtitle B›Chapter I›Part 91›Subpart E ContainsSections 91.19–91.22CorpusDaily eCFRDisplayed edition2026-05-07Last updated2026-05-07 Subpart E—Samples Sections 91.19 § 91.19 General requirements of suitable samples. 91.20 § 91.20 Shipping. 91.21 § 91.21 Protecting samples. 91.22 § 91.22 Disposition of analyzed sample. Previous D Subpart D—Laboratory Service Next F Subpart F—Method Manuals