A.    The municipality is divided into the following zoning districts:

    1.    Agricultural district:

        A-1    Agricultural district.

    2.    Residential districts:

        R-1    One-family dwelling district

        R-2    One-family dwelling district

        R-3    One-family dwelling district

        R-4    One-family dwelling district

        R-5    One-family dwelling district

        R-6    One-family dwelling district

        R-7    Multifamily dwelling district.

    3.    Business districts:

        C-1    Neighborhood business district

        C-2    General business district

        C-3    Highway business district

        CP-1    Low intensity, high quality

            commercial business park district

        CP-2    Medium intensity and quality

            commercial business park district.

    4.    Industrial districts:

        I-1    Light industrial district.

    5.    Special districts:

        S-1    Historic building district

        S-2    Slope district

        S-3    Floodplain and drainageway district.

    B.    No zoning district established in this title shall be changed or a zoning district established after the effective date of a new zoning ordinance unless the districts are of the following minimum size:

        A-1    Agricultural district    no minimum

        R-1    One-family dwelling

              district    15 acres

        R-2    One-family dwelling

              district    15 acres

        R-3    One-family dwelling

              district    10 acres

        R-4    One-family dwelling

              district    5 acres

        R-5    One-family dwelling

              district    5 acres

        R-6    One-family dwelling

              district    5 acres

        R-7    Multifamily dwelling

              district    5 acres

        C-1    Neighborhood business

              district    5 acres

        C-2    Central business district    5 acres

        C-3    Highway business district    5 acres

        I-1    Light industrial district    10 acres

        S-1    Historical building

              district    no minimum

        S-2    Slope district    no minimum

        S-3    Floodplain and

              drainageway    no minimum

        CP-1    Low intensity, high

              quality, commercial

              business park district    15 acres

        CP-2    Medium intensity and

              quality commercial

              business park district

              (shopping center, mall

              district)    15 acres.

    C.    Zoning District Map. The zoning district maps, which are on file for public inspection in the city clerk’ s office, showing the boundaries of the areas covered by the districts listed in subsection A of this section, and all notations, references and other information shown thereon shall be a part of the new zoning code and have the same force and effect as if the district maps and all the notations, references and other information shown thereon were all fully set forth or described herein, the originals of which district maps are properly attested and are on file with the municipal clerk. No amendment to the new zoning code which involves matter portrayed on the zoning district maps shall become effective until after such change and entry has been made on the zoning district maps. (Ord. 1445 §§ 1, 2, 1996; Ord. 1425 § 1, 1996; Ord. 1362 §§ 1, 2, 1995; prior code § 40-3-1)