Grade means any one of the officially established grades of cherries as defined and set forth in:
    
    
        
        (a) 
         United States Standards for Sweet Cherries ( §§ 51.2646 to 51.2660 of this title) or amendments thereto, or modifications thereof, or variations based thereon;
     
    
        
        (b) 
         Standards for sweet cherries issued by the State of Washington or amendments thereto, or modifications thereof, or variations based thereon.