The zoning enabling plan provides the necessary legal procedure for the future establishment of various districts within the unincorporated territory of the county; within such districts it is unlawful or lawful to erect, construct, alter or maintain certain buildings or to carry on certain trades or occupations or to conduct certain uses of land and/or buildings, and within which certain open spaces shall be required about future buildings, and consisting further of appropriate regulations to be enforced in such districts, all as set forth in Chapters 21.02 through 21.60. (Ord. 83-03(part))