Minor portions of public plazas are secondary areas that allow for additional flexibility in the shape and configuration of a public plaza. Minor portions shall not occupy more than 25 percent of the total area of the public plaza. The width of a minor portion shall be measured parallel to the line separating the major and minor portions. The depth of a minor portion shall be measured perpendicular to the line separating the major and minor portions. The provisions of Section 37-715 (Requirements for major portions of public plazas) shall not apply to such minor portions and the following regulations shall apply:
(a) The minor portion shall have a minimum average width and depth of 15 feet.
(b) The minor portion must be directly adjacent to the major portion.
(c) All points within the minor portion must be visible from within the major portion when viewed perpendicular to the line separating the major and minor portions.
(d) The minor portion must front directly on a street adjoining the major portion, unless the minor portion has:
(1) a width to depth ratio of at least 3:1; and
(2) its longest dimension contiguous with the major portion.