Chapter 168, Floodplain Management, of the Code of Franklin Township, enacted March 8, 1989, and as may be subsequently amended: The maps titled "Flood Insurance Rate Map," Panels 1 through 6, which delineate the borders and extent of the flood hazard areas within Franklin Township are hereby adopted as an overlay zone upon the Official Zoning Map. The underlying zoning districts and all stipulations that apply within them remain fully in force but the additional requirements of Chapter 168, Floodplain Management, shall also apply, particularly regarding lowest permitted floor elevations, building floodproofing and construction standards.