9.6.2.   Enlargement or Alteration.
   A.   No nonconforming shall be enlarged or altered in any manner that results in a greater degree of nonconformity.
   B.   No modification of the structure of any nonconforming shall be permitted, except to bring the into conformity.
   C.   Illumination may not be added to a nonconforming that previously was unilluminated.