It is the purpose of this act to provide a general law under which all fairs and agricultural societies of one county or less may operate, and as such shall be liberally construed, and shall be known as the county agricultural fair act: Provided, This act shall not apply to county agricultural or fair associations or livestock associations holding fairs and supporting the same, in counties of over fifty thousand (50,000) population, levying taxes and appropriating money as aid for such fairs, under the provisions and authority of Kan. Stat. Ann. § 2-301, 2-302, 2-303, 2-304 and 2-305, and amendments thereto.