§ 155.046 ZONING MAP.
   (A)   The location and boundaries of the districts established by this chapter is set forth on the zoning map which is hereby incorporated as part of this chapter. It shall be the responsibility of the Zoning Administrator to maintain and update this map and the amendments to such map shall be recorded on such map within 30 days after official adoption of zoning amendments.
   (B)   Whether or not they are so designated on the zoning map, residential plats which were approved prior to 8-2-1978 shall be zoned in accord with the following schedule. The Zoning Administrator shall be responsible to record the following changes on the zoning maps in a timely manner. Zoning for residential plats approved prior to 8-2-1978:
 
Average Lot Size
Zoning District
Less than 2 acres
R-1
Between 2 and 4 acres
R-2
Between 4 and 10 acres
R-2(a)
Over 10 acres
No change
 
   (C)   In addition, within shoreland areas, existing metes and bounds subdivisions comprised of five or more adjacent lots less than one acre in size shall be zoned R-1.
   (D)   The purpose of these changes is to bring existing residential areas, many of which are zoned AG, General Agriculture, into a more proper and reasonable zoning district. Many of the performance standards in the AG District cannot be reasonably applied in residential areas with small lots, and have caused hardships for the property owners affected. This change is intended to place the properties concerned into that zoning district which is specifically suited to the lot sizes in each area.