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 reenactments of such chapter, which do not
conform to the provisions of said original chapter or to such revisions
or reenactments 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 extended, except as provided in §
130-66D(2).