The board may place any county or geographical region for which a person contracts with the state for weather modification operations in any operational district the board determines necessary to best provide that county or geographical region with the benefits of weather modification. In determining the boundaries of an operating district, the board shall consider the patterns of crops within the state, climatic patterns, and the limitations of aircraft and other technical equipment. The board may assign any county that has not created a weather modification authority under this chapter to an operating district solely for the purpose of representation on the operations committee of that district.