Except as hereinafter provided, no building or land shall be constructed or used except in conformity with the provisions of this chapter which apply to the district in which it is located. However, the following provisions shall apply to all buildings and uses of land or buildings existing on the effective date of this chapter, which buildings and uses of land or buildings do not conform to the requirements set forth in this chapter; to all building and uses of land or buildings that become nonconforming by reason of any subsequent amendment to this chapter and the
Zoning Map which is a part thereof; and to all conforming buildings housing nonconforming uses.
Except as provided in §
156-49 hereinafter, no building which houses a nonconforming use shall be:
A. Structurally altered or enlarged;
B. Moved to another location where such use continues
to be nonconforming; or
C. Changed back to a nonconforming use if once changed
to a use permitted in the district in which it is located.
Nothing in this article shall be deemed to prevent
normal maintenance and repair of any building or the carrying out,
upon issuance of a building permit, of major structural alterations
or demolitions necessary in the interest of public safety, provided
that the floor area or the nonconformity is not quantitatively extended.
All the foregoing provisions relating to nonconforming
uses and buildings shall apply to all nonconforming uses and buildings
existing at the time of the adoption of this chapter and to all uses
and buildings that become nonconforming by reason of any amendment
thereof, but not to any use established or building erected in violation
of law or Zoning Ordinance or any amendment regardless of the time
of establishment or erection.