Cooperative associations organized under the provisions of Laws 1923, chapter 326, and laws amendatory thereof and laws supplemental thereto, and engaged in electrical heat, light, or power business upon a mutual, nonprofit, and cooperative plan in rural areas, as hereinafter defined, are hereby recognized as quasi-public in their nature and purposes; but such cooperative associations, which operate within the corporate limits of any city shall have a tax capacity of the market value of that portion of its property located within the corporate limits of any city as provided for in section 273.13, subdivisions 24 and 31.