(b) The latitude of variation or tolerance on samples tested for germination and purity shall be in accordance with the following, except that there will be no tolerance on germination for graded mixtures:

1. (1) Purity percentages. In the determination of the tolerance for the percentage of the distinguishable kind, type or variety (pure seed), weed seeds, other crop seeds and inert matter, the sample shall be first considered as made up of two parts:

   1. (A) The percentage of the component (pure seed, weed seed, crop seed or inert matter, as the case may be) being considered, and (B) the difference between that percentage and one hundred. The number represented by (A) is then multiplied by the number represented by (B) and the product is divided by one hundred. The resulting number is then multiplied by 0.2 (2/10) and the resulting product added to 0.2 or 0.6 as indicated in the following formulae:
2. (2) Germination. The following tolerances are applicable to the percentage of germination and also to the sum of the germination plus the hard seed: Found by test:Tolerance96 or over590 or over but less than 96680 or over but less than 90770 or over but less than 80860 or over but less than 709Less than 6010