1260.01 USE OF LAND AND BUILDINGS.
   In each zoning district, the following restrictions shall control the use of land and buildings:
   A.    Unless otherwise provided in this Zoning Ordinance, uses not specifically listed in a zoning district are not permitted in that zoning district.
   B.    Unless otherwise provided in this Zoning Ordinance, all business activity, service, storage, merchandise display, and where permitted, repair and processing, shall be conducted wholly within an enclosed building. Permitted off-street parking lots, off-street loading facilities and open sales lots, including auto sales lots and plant nurseries, need not be enclosed, but shall be screened pursuant to Chapter 1253, Landscaping and Screening Regulations.
   C.    No more than one principal building shall be located on any zoning lot in a Single-or Two-Family Residential District.
   D.    Unless otherwise provided in this Zoning Ordinance, all lots shall front on a public street.