In addition to the streetscape regulations outlined in Section 132-13, the following shall apply in Special Enhanced Commercial District 6:

In Commercial and Manufacturing Districts, other than C4-4L Districts, for developments or horizontal enlargements at the ground level, resulting in a street wall of 40 feet or wider, as measured along the street line, a sidewalk widening of five feet shall be provided along such street wall and its prolongation. A line parallel to and five feet from the street line of such street, as measured within the zoning lot, shall be considered the street line for the purpose of applying any applicable street wall provision.