The department of agriculture promulgates this chapter to implement the provisions of the Agricultural Marketing and Fair Practices Act, chapter 15.83 RCW (chapter 355, Laws of 1989). The purpose of this act is to establish standards of fair practices required of handlers, producers, and association of producers dealing in sweet corn and potatoes and to establish the mutual obligation of handlers and accredited associations of producers to negotiate relative to the production or marketing of these agricultural commodities.