When used in this division, the following words and phrases shall have the following meanings, respectively, unless the context clearly indicates otherwise:
(1) UNDERTAKING. Such term shall include all of the following revenue-producing undertakings or any combination of two or more of such undertakings, whether now existing or hereafter acquired or constructed:
a. Causeways, tunnels, viaducts, bridges and other crossings, highways, parks, parkways, airports, docks, piers, wharves, seaport or river terminals, hospitals, public markets, tennis courts, swimming pools, golf courses, stadiums, armories, auditoriums and other public buildings of all kinds, incinerator plants and systems in connection with the generation, production, transmission and distribution of electric energy for lighting, heating and power for public and private uses, together with all parts of any such undertaking and all appurtenances thereto, including lands, easements, rights-of-way, contract rights, franchises, approaches, connections, dams and reservoirs.
b. Cold storage plants, cooling plants, sterilization plants, warehouses, granaries and any other plants, works, machinery or equipment useful for the preservation or preparation of agricultural products for market or use and for the conversion of agricultural products into usable and marketable condition and for the conversion of the same into usable and marketable products.
(2) MUNICIPALITY. Such term shall include any incorporated city or town in the state.
(3) GOVERNING BODY. The board or body in which the general legislative powers of a municipality or county are vested; provided, that this division shall not authorize any county, city or town to construct an undertaking provided for in paragraph (1) a of this section in any city or town or in any portion of a county which is then adequately served by a like undertaking or undertaking performing the proposed service; provided further, that nothing contained in this division shall authorize the construction or operation of an undertaking for the purpose of manufacturing ice for sale at retail or for retail to the public.