Nonconformities are declared by this Code to be incompatible with permitted uses in the districts in which such uses are located. To further the purposes of this chapter, regulations are established for various types of nonconformities, as follows:
(a) Nonconforming uses of land or structures;
(b) Nonconforming structures in terms of setbacks, lot area or other dimensional standards;
(c) Nonconforming sites in terms of number of parking spaces, landscaping or other site development standards; and
(d) Nonconforming vacant lots of record.