In business districts, no sign shall be erected or maintained unless
and until it complies with the following provisions:
A. No such sign shall be erected on any roof, eaves or extended
above a parapet wall.
B. Such sign must be constructed and maintained flat or
parallel with the building wall to which it is attached and shall not exceed
more than 18 inches from such exterior building wall.
C. At any place of business which maintains off-street parking
for the use of its customers, in addition to the signs herein permitted, there
may be one sign indicating the availability of off-street parking for such
customers. Such signs shall not be more than one square foot in area, with
the bottom of the sign no more than five feet above the ground, provided that
no letter on such sign shall be more than six inches in height or width; such
sign shall lie within the property line of the premises on which the sign
is erected; and such sign shall not be so located so as to create a hazardous
or dangerous condition with respect to traffic. The placement of such sign
in a position that makes it difficult for the drivers of automobiles to read
legal signs present on other premises creates a presumption that such sign
is so located as to create a hazardous or dangerous condition with respect
to traffic and its proper movement at proper speed.