Grade means any of the officially established grades of onions, and size means any of the officially established sizes of onions, as set forth in:

(a) The United States Standards for grades of onions (other than Bermuda-Granex and Creole Types) (§§ 51.2830 to 51.2850 of this title), or amendments thereto, or modifications thereof, or variations based thereon; and

(b) Any other United States Standards, or State of Idaho or Oregon Standards for onions, or amendments thereto, or modifications thereof, or variations based thereon.