2005 California Food and Agricultural Code Sections 41131-41132 Article 2. Exceptions

41131.  This chapter does not apply to grapes which are marketed by
or through a nonprofit cooperative marketing association unless the
board of directors of the association elects to have the soluble
solid determination of the grapes of its members determined as
provided in this chapter and notifies the agricultural commissioner
of each county in which the association operates any winery of such
election.
41132.  This chapter does not affect the right of a purchaser of
grapes for wine and byproducts purposes to specify a minimum
percentage of soluble solids as a definition of maturity of the
grapes if the price which is to be paid is to be determined other
than on the basis of the soluble solid contents of the grapes.