For the purposes of applying the applicable bulk regulations, the boundaries of waterfront public access areas, as well as lot lines abutting public parks, shall be considered narrow street lines.

Where a continuous sidewalk widening is provided along the entire frontage of a zoning lot, the interior boundary of such widening shall be considered a street line for the purpose of applying the height and setback regulations of this Chapter, except that where a sidewalk widening is provided pursuant to Section 139-43 (Sidewalk Widening Requirements), any setback required by this Section may be reduced by one foot for each foot by which the sidewalk is widened, provided that no setback shall be less than seven feet in depth.

Where a provision of this Chapter allows a modification to the maximum building height, and multiple modifications apply to a building, such modifications shall be applied cumulatively.