Any lawful building, structure, structure and
land in combination or use of such premises existing at the time of
enactment of this chapter or any subsequent amendment thereof applying
to such building, structure, structure and land in combination or
use of such premises may be continued although such building, structure,
structure and land in combination or use does not conform to the provisions
hereof, except as follows: Any sign which becomes nonconforming upon
the date of enactment of this chapter shall be removed or altered
so as to conform within three years after such date of enactment.
Any structure or structures and land in combination
in or on which a nonconforming use is superseded by a permitted use
shall not thereafter be used for or occupied by a nonconforming use.
A building or structure of nonconforming use
may be repaired or restored to a safe condition.
Any building or structure on which construction
was begun prior to the effective date of this chapter or any subsequent
amendment thereof applying thereto may be completed and used in accordance
with the plans and specifications for such building or structure.
No lot shall be reduced in area so that it creates
a nonconforming building or use in violation of any regulations contained
in this chapter.