(a) No permit or variance shall be issued for a non-residential structure designed to be watertight below the regional flood elevation until the applicant submits a plan certified by a registered professional engineer or architect that the floodproofing measures will protect the structure or development to the flood protection elevation and submits a FEMA Floodproofing Certificate.
(b) For a structure designed to allow the entry of floodwaters, no permit or variance shall be issued until the applicant submits a plan either:
(1) Certified by a registered professional engineer or architect: or
(2) Meets or exceeds the following standards:
a. A minimum of two (2) openings having a total net area of not less than one (1) square inch for every square foot of enclosed area subject to flooding;
b. The bottom of all openings shall be no higher than one (1) foot above grade; and
c. Openings may be equipped with screens, louvers, valves, or other coverings or devices provided that they permit the automatic entry and exit of floodwaters.
(c) Floodproofing measures shall be designed, as appropriate, to:
(1) Withstand flood pressures, depths, velocities, uplift and impact forces and other regional flood factors;
(2) Protect structures to the flood protection elevation;
(3) Anchor structures to foundations to resist flotation and lateral movement;
(4) Minimize or eliminate infiltration of flood waters; and
(5) Minimize or eliminate discharges into flood waters.