These provisions shall apply to all buildings or structures,
and all uses of buildings or structures, or lots lawfully existing
prior to the effective date of this chapter, or of subsequent amendments,
revisions or re-enactments of such chapter, which do not conform to
the provisions of said zoning ordinance, or to such revisions or re-enactments
on their effective dates.
No unlawful building or structure, or unlawful use of a building
or structure or lot existing at the effective date of this chapter
shall be deemed to be a nonconforming building, structure, or use.
A nonconforming use shall not be enlarged or extend, except as provided in §
270-13.4D(2).
A nonconforming use shall be changed only to a conforming use, except as provided in §
270-13.4D(2).