CFR › Title 7 › Part 51 › §51.22827 CFR §51.2282Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)All percentages shall be calculated on the basis of weight.(b)In order to allow for variations incident to proper grading and handling, tolerances shall be permitted for the respective color classifications as indicated in Table II: