The following provisions shall apply whenever any improvement is made to an existing structure located within any identified floodplain area:
No expansion or enlargement of an existing structure shall be allowed within any floodway area that would cause any increase in the BFE.
No expansion or enlargement of an existing structure shall be allowed within an AE Area/District that would, together with all other existing and anticipated development, increase the BFE more than one foot at any point.
Any modification, alteration, reconstruction, or improvement, of any kind to an existing structure, to an extent or amount of 50% or more of its market value, shall constitute a substantial improvement and shall be undertaken only in full compliance with the provisions of this Part 2.
The above activity shall also address the requirements of the 34 Pa. Code, as amended, and the 2009 IBC and the 2009 IRC.