For the purpose of this Zoning Ordinance, the City of Spencer is hereby divided into nine zones, differentiated according to use and building regulations, and to be designated as follows:
F-1 Floodplain District
R-1 Low-Density Single-Family Residential District
R-2 Medium Density Single-Family Residential District
R-3 Multi-Family Residential District
C-1 Neighborhood Commercial District
C-2 General Commercial District
C-3 Roadside Commercial District
M-1 Light Industrial District
M-2 General Industrial District.
(1977 Code Title 4A.)