The Commissioner of Agriculture and Industries, with the approval of the State Board of Agriculture and Industries, shall have authority to adopt and promulgate official grades for the purpose of determining the grade, quality, classification or condition of fresh fruits and vegetables grown in the State of Alabama, and the commissioner, with the approval of the Board of Agriculture and Industries, is authorized to adopt as official grades for fresh fruits and vegetables such grades as have been promulgated by the United States Department of Agriculture. The grades for fresh fruits and vegetables adopted under this section shall be official grades therefor. The Commissioner of Agriculture and Industries, through agents duly designated by him, is authorized to issue certificates of inspection certifying as to the grade of fresh fruits and vegetables inspected by such agents. Certificates of inspection issued by the United States Department of Agriculture certifying official grades shall be recognized as complying with this article where certificates of inspection are required under this article.