CA Food & Agric Code Section 6214

(a)

Upon the presentation and filing of a petition, the board of supervisors shall refer the petition to the county agricultural commissioner for the preparation of a register of owners of winegrape acreage within the proposed district, and for an investigation and report.

(b)

The agricultural commissioner shall create a register of all winegrape acreage owners within the proposed district describing the net acreage of land devoted to the growing of winegrapes by each grower. The commissioner shall file with the register a report and recommendation to the board of supervisors on whether conditions of the phylloxera or other pest or disease warrant the board of supervisors proceeding with the organization of the district.