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19 <br />Openings to relieve hydrostatic pressure during a flood shall be Provided <br />conforming to subsection 5 ot this -S-er-ft-i-OW-1. <br />An accesso Lure with M dimension that is twelve feet or less in <br />height widtlL or depth does not require - an elevation or flood nmnflng <br />certificate. Elevation or floolpEggfin 1, _ ..cerfifications are required for all <br />other access ry structures according to Section 14.6(2h and <br />h. The accessory structure shall meet all zoning and building code requirements. <br />9. AdditiqgLlIm <br />,provements. <br />a- Additions and/or improvements to Pre -FIRM structures whereas the <br />addition and/or <br />_ improvements in combinabon with any interior <br />modifications, to the existing structure are: <br />i. Not a substantial improvement is defined and does not require a zoning <br />or building permit, the addition and/or improvements shall be designed <br />t_o 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 />pgrmit, both the existing structure and the addhtlon and/or improvements <br />shall comply with the standards for new construction. <br />b.— Additions to post FIRM structures with no modifications to the existing <br />structure shall require only -pnl the addition to comply with the standards <br />— <br />new construction. <br />c. Additions- and/or imp—rovements 10. OSt -FIRM structures whereas the <br />addition and/or . its in combination with any -interior <br />modifications to the existing strur-ture- <br />Not * a substantial ....improvement, the addition <br />improvements only must comply wish the standards for new <br />construction-, <br />ii A substantial iggrovement, both the existing structure and_ the <br />addition and/or improvements must comply with the standards <br />for new construction. <br />