All developments, excepts those developments on site areas that abut the northerly side of Third Street, shall provide open space within the development site area that meets the following standards:
   A.   The amount of open space shall equal at least five percent (5%) of the floor area of the development. Setback areas shall not be considered open space for the purposes of this subsection except as provided in section 10-3-2010 of this article.
   B.   The open space shall be visible from a public sidewalk and shall be accessible from a public sidewalk and shall be without obstruction by gates, doors or similar features during standard business hours. (Ord. 94-O-2193, eff. 3-4-1994)