The purpose of this article is to set forth when a nonconforming
structure which has been partially removed, demolished or destroyed
has been extinguished so that such nonconforming structure cannot
be rebuilt, restored or repaired.
If 50% or more of any existing nonconforming structure shall
be removed, demolished or destroyed, either intentionally or due to
fire, wind, rain, snow, or other elements, such nonconforming structure
may not be rebuilt, restored or repaired and the preexisting construction
of such nonconforming structure shall cease.