Permits shall terminate with respect to:
A. Signs which advertise or call attention to any products
or services which are no longer sold on the premises or to any business
or activity which is no longer operated on said premises for at least
60 days, except if such business is seasonal in operation, 180 days
shall apply.
B. Signs which have not been erected within six months
from the date the permit was issued.
C. Existing signs, upon their alteration.