(A) It is intended by this chapter to establish a Secondary Floodplain Combining Zone, which shall apply to properties which lie within areas where inundation may be caused by overflow and backwater, which is relatively free of any current, excluding, however, those areas lying within an FP1 zone, but which require special regulations for the protection of such properties and their improvements from hazards and damages which may be caused from floodwaters.
(B) There is established a Secondary Floodplain Combining Zone, designated as FP-2, which, when shown upon the zoning map of the city in combination with a basic zoning symbol such as R-1, C-2 and M-2, shall cause the property so designated to be subject to the code provisions relating to such combining zone and the provisions set forth in this chapter.
(`78 Code, § 17.56.010.)