In determining whether this

chapter is approved by producers, the secretary shall find both of the following: (

a) That at least percent of the total number of producers from the list established by the secretary participated in the referendum, and that either one of the following has occurred:

(1) Sixty-five percent or more of the producers who voted in the referendum voted in favor of this chapter, and the producers so voting market a majority of the volume of winegrapes in the preceding market season, or in the current marketing season if the harvest is completed prior to the vote, by all the producers who voted in the referendum.

(2) A majority of the producers who voted in the referendum voted in favor of this chapter, and the producers so voting marketed percent or more of the volume of winegrapes in the preceding marketing season, or in the current marketing season if the harvest is completed prior to the vote, by all the producers who voted in the referendum. (

b) That at least percent of the total number of vintners from the list established by the secretary participated in the referendum, and that either one of the following has occurred:

(1) Sixty-five percent or more of the vintners who voted in the referendum voted in favor of this chapter, and the vintners so voting either acquired or processed their own production, or a combination thereof, that represents a majority of the volume of winegrapes in the preceding marketing season, or in the current marketing season if the harvest is completed prior to the vote, by all the vintners who voted in the referendum.

(2) A majority of the vintners who voted in the referendum voted in favor of this chapter, and the vintners so voting either acquired or processed their own production, or a combination thereof, that represents percent or more of the volume of winegrapes in the preceding marketing season, or in the current marketing season if the harvest is completed prior to the vote, by all the vintners who voted in the referendum.