It is hereby declared, as a matter of legislative determination, that the producers, or handlers, or both producers and handlers, appointed to any advisory board pursuant to this article are intended to represent and further the interest of a particular agricultural industry concerned, and that such representation and furtherance is intended to serve the public interest. Accordingly, the Legislature finds that, with respect to persons who are appointed to such advisory boards, the particular agricultural industry concerned is tantamount to, and constitutes, the public generally within the meaning of Section 87103 of the Government Code.