In comparing elevations, the elevations identified in FEMA FIS 360497 and FEMA FIRMs 360497 that are expressed in relation to the National Geodetic Vertical Datum ( NGVD) shall be converted to the North American Vertical Datum ( NAVD). All references in this appendix to elevations in FEMA FIS 360497 and FEMA FIRMs 360497 shall be deemed to refer to the greater of (i) the elevations identified in the FEMA FIS 360497/FEMA FIRMs 360497 or (ii) the elevations identified in the FEMA PFIS 360497/FEMA PFIRMs 360497.Notwithstanding any other provision in this appendix to the contrary: This appendix shall apply to retroactive requirements as provided for in Section G311. The conversion of any space below the design flood elevation from nonhabitable space into habitable space shall be deemed an increase in the degree of noncompliance. Where such alteration is a change in use, occupancy or how such space is used, provided that such change would not increase the degree of noncompliance with requirements of this appendix.Where the alteration or repair comprises the installation of new components, materials, finishes or equipment in a space within the structure where similar pre- FIRM components, materials, finishes or equipment already exist and.Where the alteration or repair comprises the replacement of pre- FIRM components, materials, finishes or equipment.The following alterations or repairs, other than substantial improvements, shall not be deemed as an increase in the degree of noncompliance: This appendix shall apply to alterations or repairs to pre- FIRM buildings and structures, including installation of new components, materials, finishes and equipment, that increase the degree of noncompliance with this appendix. Other alterations to pre-FIRM construction.The existing portions of the structure shall not be required to comply, unless otherwise required because the alteration is deemed a substantial improvement and This appendix shall apply to horizontal enlargements of pre- FIRM buildings and structures to the extent of such horizontal enlargement, including but not limited to additions, decks, carports, or similar appendages. Horizontal enlargements of pre-FIRM construction.This appendix shall apply to substantial improvement of pre- FIRM buildings and structures, including restoration after damage, as if hereafter erected Substantial improvement of pre-FIRM construction.This appendix shall apply to repair, reconstruction, rehabilitation, or additions to post-FIRM construction Alterations to post-FIRM construction.This appendix shall apply to post-FIRM construction This appendix shall apply to placement and replacement of prefabricated buildings and manufactured homes Prefabricated buildings and manufactured homes.This appendix shall apply to site improvements, including but not limited to, temporary or permanent storage of materials, mining, dredging, filling, grading, paving, excavations, operations and other land disturbing activities This appendix shall apply to placement and replacement of Group U buildings as defined in Section 312 This appendix shall apply to the installation of utilities This appendix shall apply to the subdivision of land
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