The following uses are prohibited in a G heavy manufacturing district.
   (a)   Dwellings.  Dwellings and residences of any kind, including motels and trailer parks, also schools, hospitals, clinics and other institutions for human care, except where they are incidental to a permitted principal use; provided, that any of the aforesaid uses legally existing in the G district on April 26, 1968, or at the time of the adoption of any amendment to this chapter, shall not be classified as a nonconforming use.
   (b)   Business and services.  Retail business, personal and business service establishments of any kind, except the following:
      (1)   Restaurants or cafeterias and refreshment or tobacco stands where incidental and accessory to a principal use;
      (2)   Animal hospitals;
      (3)   Storage and equipment yards;
      (4)   Automobile service stations and repair garage; and
      (5)   Union halls.
(Ord. 2046, passed 4-11-1968; Ord. 2691, passed 2-12-1979)