Due to historical development patterns, certain areas of the City are characterized by a mixture of uses such as residential and commercial uses, or residential and industrial uses, which are normally segregated under standard zoning districts. Because of the variety of circumstances which exist in different areas of the City, and the different treatment accorded those areas in the Growth Policy, it is not possible to establish a zoning district with uniform listing of uses and standards. Therefore, the historic mixed use district is intended to provide procedures and criteria for recognition of such areas.