The lowest part of any such canopy, sign or any nonrigid awning, or any support thereof, shall be at least seven feet above the level of the walk or public way over which it extends, but no such sign shall be maintained over any public way used by vehicles if any part of the sign or its support is less than 15 feet above the level of such public way.
(‘82 Code, § 12.28.020) Penalty, see § 92.999