Any portion of a building that exceeds a height of 125 feet shall comply with the following provisions:

1. Tower location and maximum tower height
   
   All towers shall be located entirely within a Tower Area as designated on Map 6 (Tower Areas), in Appendix A of this Chapter. The maximum height of such towers shall be as indicated for the specified location on Map 6. For buildings higher than 165 feet, the gross area of all stories entirely within 40 feet of the highest roof level of the building shall be at least 50 percent shall not exceed 90 percent of the story located directly below the stories within 40 feet of the highest roof level. 
2. Orientation and maximum tower size
   
   The outermost walls of each story located entirely above a height of 125 feet shall be inscribed within a rectangle. The maximum length of any side of such rectangle that is parallel or within 45 degrees of being parallel to Second Street or Center Boulevard, whichever is closest, shall be 100 feet. The maximum length of any other side of such rectangle shall be 170 feet. Each story of a tower located entirely above a height of 125 feet shall not exceed a gross area of 11,000 square feet.
   
   However, on Parcel G in the East River Subdistrict, the maximum length of the side of such rectangle that is parallel or within 45 degrees of being parallel to Second Street shall not exceed 170 feet.
3. Tower and base integration
   
   Notwithstanding the setback provisions of paragraph (c) of Section 125-33 (Required Street Walls), up to 50 percent of the street wall width of a tower may rise sheer from grade without setback. The underlying dormer provisions of paragraph (b)(1) of Section 23-413 (Permitted obstructions in certain districts) shall be superseded by this Section for tower portions of buildings.