All developments which are located on a zoning lot with frontage along Emmons Avenue, Sheepshead Bay Road, Ocean Avenue, Bedford Avenue or Nostrand Avenue shall contain a sidewalk extension area, which complies with the following requirements:
(a) has a minimum depth of five feet, measured perpendicular to such street lines;
(b) extends the full length of the zoning lot along such street lines, except for existing buildings within five feet of the street line;
(c) is open and unobstructed from its lowest level to the sky;
(d) maintains continuity with the established sidewalk, to which it shall be immediately adjacent throughout its entire length;
(e) is available for public use at all times; and
(f) has a paved surface which complies with standards as established by the New York City Department of Transportation.