Section 160-I. Grades or standards; establishment; sale

The commissioner
  is hereby authorized and empowered, after  investigation,  to  establish
  and  promulgate  official  standards of quality for grading, classifying
  and packing grapes packed or repacked within the state,  and  to  change
  any  of  them from time to time. In establishing such standards he shall
  take into account, among other things, the factors of  maturity,  color,
  firmness  of  attachment to capstems, compactness of bunches, and damage
  caused by freezing or by disease or insects. The official  standards  so
  established  and  promulgated  shall  not be lower in their requirements
  than  the  minimum  requirements   of   the   official   standards   for
  corresponding  grades  of grapes as promulgated from time to time by the
  secretary of agriculture of  the  United  States,  which  standards  are
  commonly known as "United States grades."
    From  and  after  the establishment of specific grades or standards of
  quality as hereinbefore  provided,  grapes  in  packages  shall  not  be
  shipped  for  sale  or thereafter sold or exposed for sale except by the
  grades or standards so established; provided, however, that  grapes  not
  graded  and  classified as to quality may be shipped for sale or sold or
  exposed for sale as unclassified if so marked in a conspicuous manner on
  an irremovable-part of the container in  accordance  with  rules  to  be
  adopted by the commissioner as hereinafter provided.