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M (6) Residential buildings must have the lowest floor elevat- ed to the Flood Protection Elevation for that site. If fill is used for foundation support, the elevation of the soil support shall not be greater than that which would result from the erosion reasonably anticipated as a result of the design storm conditions. (7) Industrial, commercial or other viOvif 0010¢4t4$1 build- ings, facilities or equipment must have the lowest floor elevated to the Flood Protection Elevation or be flood -proofed as follows: (a) A Florida registered Professional Engineer or Architect must certify that the building has been designed and constructed so that below the Flood Protection Elevation, the structure and attendant electrical, heating, ventilation, plumb- ing, and air-conditioning equipment and other service facilities Ot XXXt//W=/ii/e/s are watertight and capable of resisting the effects of the regulatory flood. The design must take into account flood velocities, duration, rate of rise, hydrostatic and hydrodynamic forces, the effect of buoyancy, scour, erosion, and impacts from debris. (b) Flood -proofing measures must be operable without human intervention and without an outside source of electricity. (8 ) 4000400 f jO4At/ /c74ho gV / yb/y/ / f OOgT (q. For all new construction and substantial improvements, fully enclosed areas which are below the lowest floor and which are subject to flooding shall be designed to automatically e ualize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either by certified by a registered professional engineer or architect or must meet or exceed the following minimum criteria: A minimum of two openings have a total net area of not less than one square inch for every square foot of enclosed area subject to flooding shall be provid- ed. The bottom of all openings shall be no higher than one foot above grade. Openings may be equipped with screens, louvers, or other coverings or devices provided.that they permit the automatic entry and exit of floodwaters. (9) Sewage treatment and potable water supply systems must be designed and located to prevent inflow or contamination of surface waters up to the Flood Protection Elevation. Electrical and communications utilities must be designed to avoid flood damage up to the Flood Protection Elevation. (10) M016 .//-VVo'g7/cXdv/i/aiX1/1XOOXOa/,iVi �Ef f3b0//C//gWe. Manufactured homes must not be installed in a floodway or coastal High Hazard Zone. All manufactured homes to be placed or substantially improved within Zones A1-30 shall be elevated on a permanent foundation such that the lowest floor of the manufactured home is at or above the base flood elevation and