For a corner lot, or portions thereof, bounded by two wide streets on the west side of Eighth Avenue within the Eighth Avenue Corridor of the Theater Subdistrict, the sign provisions for C6-7 Districts pursuant to Section 32-60 (SIGN REGULATIONS) shall apply only to such corner lot portion, with the following modifications:

(a)        no sign shall function with sound; and

(b)        illuminated signs may face both wide streets, or be parallel to the street line of one wide street.