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19 <br />f Openings to relieve hydrostatic pressure during a flood shall be provided <br />conforming to subsection 5 of this Section; <br />g An accessory structure with any dimension that is twelve feet or less in <br />height width or death does not require an elevation or flood proofing <br />certificate Elevation or flood proofing certifications are required for all <br />other accessorystructures according to Section 14.6(31: and <br />h The accessory structure shall meet all zoning and building code requirements. <br />9. Additions/Improvements. <br />a Additions and/or improvements to pre-FIRM structures whereas the <br />addition andlor improvements in combination with any interior <br />modifications to the existing structure are: <br />i Not a substantial improvement as defined and does not require a zoning <br />or buildingpermit the addition and/or improvements shall be designed <br />to minimize flood damages and shall not be any more non-conforming <br />than the existing structure. <br />ii Substantial improvement as defined requiring a zoning or building <br />permit both the existing structure and the addition and/or improvements <br />shall comply with the standards for new construction. <br />b Additions to post-FIlZM structures with no modifications to the existing <br />structure shall require only the addition to comply with the standards for <br />new construction. <br />c Additions and/or improvements to post-FIRM structures whereas the <br />addition and/or improvements in combination with any interior <br />modifications to the existing structure are: <br />i Not a substantial improvement the addition and/or <br />improvements only must comply with the standards for new <br />construction; and, <br />ii A substantial improvement both the existing structure and the <br />addition and/or improvements must comply with the standards <br />for new construction. <br />