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all necessary permits which are obtainable at such <br /> time have been received from those governmental <br /> agencies from which approval is required by <br /> Federal or State law, including Section 404 of the <br /> Federal Water Pollution Control Amendments of <br /> 1972 , 33 U. S. C. 1334. (b) obtain , review, and <br /> reasonably utilize any base flood elevation and <br /> floodway data available from a Federal , State , local <br /> or other source , as criteria for requiring that new <br /> construction , substantial improvements , or other <br /> development in Zone A meet floodplain zone provisions. <br /> 4 . No land within areas designed as V (velocity ) <br /> j Zones on the F. I .A. Flood Rate Maps shall be <br /> 3 developed unless such development is demonstrated <br /> by the application to be located landward of the <br /> reach of the mean high tide. Notwithstanding the <br /> applicable provisions of the Massachusetts Uniform <br /> Building Code , all new construction and <br /> substantial improvement within the V zones shall <br /> be (a ) elevated on adequately anchored pilings or <br /> columns , and securely anchored to such piles or <br /> columns so that the lowest portion of the <br /> structural members of the lowest floor (excluding <br /> the pilings or columns ) , is elevated to or above <br /> the base flood elevation ; and (b ) certified by a <br /> registered professional engineer or architect that <br /> the structure is securely anchored to adequately <br /> anchored pilings or columns in. order to withstand <br /> velocity waters and hurricane wave wash . The <br /> following shall be prohibited with said V zones . <br /> (A) Any man-made alteration of sand dunes <br /> which might increase the potential for <br /> flood damage. <br /> ( B) Use of fill for structural support for new <br /> construction or substantial improvement of <br /> structures . <br /> ( C) Manufactured homes (except in existing manu- <br /> factured home parks and existing manufactured <br /> home subdivisions ) . <br /> q 5 . The Zoning Board of Appeals may vary the <br /> restrictions and requirements set forth in <br /> this section in the case of new structures or <br /> where there is to be substantial improvements <br /> or other development on a lot of one-half acre <br /> in size or less , contiguous to and surrounded by <br /> { lots with existing structures constructed below <br /> the base flood elevation , provided the following <br /> are met : <br /> 11 - 2 <br />