(a) "Cooperative" means any corporation organized under this chapter or which becomes subject to this chapter in the manner hereinafter provided;
(b) "Person" means any natural person, firm, association, corporation, business trust, partnership, federal agency, state or political subdivision or agency thereof, or any body politic; and
(c) "Rural areas" means any area of the state not included within the boundaries of any city or village having a population in excess of twenty thousand inhabitants.