CFR›Title 7›Subtitle B›Chapter I›Part 51›Subpart B›Subject Group Methods of Sampling and Calculation of Percentages ContainsSection 51.308CorpusDaily eCFRDisplayed edition2026-05-20Last updated2026-05-20 Sections 51.308 § 51.308 Methods of sampling and calculation of percentages. Previous Marking Requirements Marking Requirements Next Metric Conversion Table Metric Conversion Table