Grade
Grade means any one of the officially established grades of potatoes, and size means any one of the officially established sizes of potatoes as defined and set forth in:
(a) The U.S. Standards for Potatoes issued by the U.S. Department of Agriculture (§§ 51.1540 to 51.1566 of this title), or amendments thereto or modifications thereof, or variations based thereon;
(b) U.S. Standards for Grades of Potatoes for Processing as issued by the U.S. Department of Agriculture (§§ 51.3410 to 51.3424 of this title), or amendments thereto, or modifications thereof, or variations based thereon;
(c) U.S. Standards for Grades of Peeled Potatoes (§§ 52.2421 to 52.2433 of this title), or amendments thereto or modifications thereof, or variations based thereon; and
(d) State of Washington Standards for Potatoes issued by the State of Washington Director of Agriculture, or amendments thereto, or modifications thereof, or variations based thereon.