No building shall hereafter be erected and no
existing building shall be moved, structurally altered, rebuilt, added
to or enlarged, nor shall any land be used for any purpose other than
those included among the uses listed as permitted uses in each zone
by this chapter and meeting the requirements set forth in the appended
Schedule; nor shall any open space contiguous to any building be
encroached upon or reduced in any manner, except in conformity to
the area and bulk requirements, off-street parking requirements and
all other regulations designated in the Schedule and this chapter
for the zone district in which such building or space is located.
In the event of any such unlawful encroachment or reduction, such
building or use shall be deemed to be in violation of this chapter,
and the certificate of occupancy shall become void.