Within the Special District, at least 60 percent of the total floor area permitted on a zoning lot shall be within stories located partially or entirely below a height of 150 feet from curb level.

For the purposes of determining allowable floor area, where a zoning lot has a mandatory 85 foot high street wall requirement along Broadway, the portion of the zoning lot located within 50 feet of Broadway shall not be included in lot area unless such portion contains or will contain a building with a wall at least 85 feet high coincident with the entire street line of Broadway.