No modifications or additions to a nonconforming
use or a nonconforming structure shall be permitted unless they are
made in conformity with the provisions of this chapter for the area
of the floodplain occupied. The words "modification" and "addition"
include, but are not limited to, any alteration, addition, modification,
structural repair, rebuilding or replacement of any such existing
use, structure or accessory structure or use. Ordinary maintenance
repairs are not considered modifications or additions; these include
internal and external painting, decorating, paneling and the replacement
of doors, windows and other nonstructural components and the maintenance,
repair or replacement of existing private sewage or water supply systems
or connections to public utilities. Ordinary maintenance repairs do
not include any costs associated with the repair of a damaged structure.