(a)   Except as specifically stated in other parts of these regulations, no building shall be erected, converted, enlarged, reconstructed or structurally altered to exceed the height limit hereinafter established for the district in which the building is located.
   (b)   Penthouse or roof structures for the housing of elevators, stairways, tanks, ventilating fans or similar equipment required to operate and maintain the building, and fire or parapet walls, skylights, towers, steeples, stage lofts and screens, flagpoles, chimneys, smokestacks, wireless masts, water tanks or similar structures may be erected above the district height limits stated herein ac cording to the following regulations:
      (1)   No such structure shall exceed the permitted height in the district by more than fifteen (15) feet.
      (2)   No such structure shall have a total area greater than twenty five (25) percent of the roof area of the building.
      (3)   Such structure shall be incidental to the principal use of the building.
   (c)   Radio, television and wireless aerials or masts may be erected to any height.
   (d)   Public or semi public buildings when permitted or conditionally permitted in a district may be erected to a height not to exceed forty five (45) feet.
      (1)   Churches and temples may be erected to a height not to exceed seventy five (75) feet if the building is set back from each yard line at least one (1) foot for each one (1) foot of additional building height above the height limit otherwise provided in the district which the building is located.