The department may allow, in each of its existing and future agricultural parks, the disposition of no more than two lots within an agricultural park for the processing, marketing, and displaying of agricultural crops or commodities, which shall include any product created through value-added processes as defined by rules adopted by the board. The department shall allow agricultural-based commercial venture operations that may sell to the general public; provided that any such lots shall be leased and operated by an agricultural park lessee in good standing with the department.