Class and subclasses

The one class of mustard is the seed of yellow (Brassica hirta) or oriental or brown mustard (Brassica juncea) which, before the removal of dockage, contains at least fifty percent of these mustard seeds, and not more than ten percent of grains officially graded under the United States Grain Standards Act. The class is divided into four subclasses: 1. Yellow. Any variety of Brassica hirta but not in excess of five percent of brown or oriental mustard, singly or combined, after dockage removal. 2. Oriental. Any variety of Brassica juncea having yellowish seeds, but not in excess of five percent yellow or brown mustard seeds, singly or combined, after dockage removal. Oriental mustard may contain up to five percent seed having brown seedcoats due to staining or weathering. 3. Brown. Any variety of Brassica juncea having brown seeds, but not in excess of five percent yellow or oriental seeds, singly or combined, after dockage removal. 4. Mixed. Any mixture of mustard containing less than ninety-five percent yellow, oriental, or brown, and more than five percent of one subclass or combination of subclasses, after dockage has been removed.