1.   For the purpose of this Ordinance, the following Base Zoning Districts are designated:

   A-1 Agricultural District

   R-1 Rural Estate Residence District

   R-2 Single-Family Residence District

   R-3 Single and Two-Family Residence District

   R-4 Multi-Family Residence District

   R-5 Mobile Home Residence District

   R-6 Campground Residence District

   B-1 Limited Retail Business District

   B-2 General Business District

   I-1 Limited Industrial District

   I-2 General Industrial District

   I-3 Heavy Industrial District

   SU-CC Specific Use: Community College District

   SU-MC Specific Use: Medical Center District

2.   In addition, the following is established as an Overlay District, with additional regulations that complement the underlying Base Districts above:

   O-OT Old Town Overlay District

Additional Overlay Districts may be established, through an amendment of this Ordinance, including those established for the purpose of accommodating a Planned Unit Development (PUD), as outlined in Section 165.17.

3.   The boundaries of these districts are hereby established as shown on a map entitled “Zoning Map” which is hereby made a part of this Ordinance. The Official Zoning Map is maintained at City Hall. The district boundary lines on said map are intended to follow lot lines, the centerlines of streets or alleys, the centerlines of streets or alley projected, railroad right-of-ways, or the corporate boundary. Questions concerning the exact location of District boundary lines shall be determined by the Board of Adjustment according to rules and regulations which it may adopt, as provided in this Ordinance. All territory which may hereafter be annexed to the community shall be classed automatically as being in an “A-1 Agricultural District”, until such classification is changed by amendment of this Ordinance.