Along street frontages where a sidewalk widening is required pursuant to Map 3 in the Appendix to this Chapter, the street wall location requirements of this Section shall apply from the interior boundary of such sidewalk widening.

(a)        Along primary street frontages

Along primary street frontages, as shown on Map 3, at least 60 percent of the aggregate width of street walls shall be located within eight feet of the street line and rise to at least the minimum base height as specified in Section 127-233 (Base heights and setback regulations), or the height of the building, whichever is lower. The remaining aggregate width of street walls may be located either within eight feet of the street line or beyond eight feet of the street line. The requirements of this paragraph shall not apply to the portion of a building adjacent to the major portion of a publicly accessible area, as specified in Section 127-43 (Publicly Accessible Area).

(b)        Along secondary street frontages

Along secondary street frontages, as shown on Map 3, street walls may be located at any distance from the street line.

(c)        Along all street frontages

Along both primary and secondary street frontages, recesses shall be permitted at the ground floor level as follows:

(1)        recesses up to three feet in depth from the street wall shall be permitted at any distance from the street line to provide access to the building; and

(2)        recesses that exceed a depth of three feet from the street wall shall be permitted, provided that such recesses are not deeper than 10 feet and have a height of at least 15 feet, as measured from the adjacent sidewalk level to the ceiling of such ground floor recess.