Type 4 street walls, as shown on Map 4 in Appendix A of this Chapter, shall comply with the provisions of this Section.

(a)        The upper street wall shall be located within five feet of the street line or mandatory widened sidewalk line, as applicable. Such street wall shall extend along at least 50 percent of the length of the street line or mandatory widened sidewalk line of the Parcel, as applicable, and shall rise without setback to a minimum height of 60 feet above curb level, or the height of the building, whichever is less.

(b)        The lower street wall shall be set back at least two feet but no more than 10 feet from the upper street wall required pursuant to paragraph (a) of this Section and shall extend along at least 50 percent of the street line or mandatory widened sidewalk line of the Parcel, as applicable.

(c)        No street wall location regulation shall apply to the remaining 50 percent of the street frontage of a Parcel.