CFR›Title 7›Subtitle B›Chapter I›Part 28›Subpart A›Subject Group Sample or Type Comparison ContainsSections 28.45–28.47CorpusDaily eCFRDisplayed edition2026-05-07Last updated2026-05-07 Sections 28.45 § 28.45 Scope of comparison; requests. 28.46 § 28.46 Method of submitting samples and types. 28.47 § 28.47 Statement of finding for comparisons. Previous Reviews Reviews Next Violations Violations