The height and setback modifications of this Section shall apply as follows:

1. Permitted obstructions
   
   Any portion of an easement volume shall be considered a permitted obstruction within a required setback or above any maximum base height, maximum building height, or sky exposure plane set forth in height and setback regulations of this Resolution. Any easement volume, including any use or structure therein, shall be located at least 20 feet from any legally required window at the same level on the zoning lot.
2. Special height provisions
   
   Where maximum building height limitations apply, the maximum building height shall be increased by 10 feet, or one story, whichever is less.
   
   However, for zoning lots with an easement volume serving an above-grade mass transit station in R7 through R12 Districts, Commercial Districts mapped within or with a residential equivalent of such districts, M1 Districts paired with such districts, or any other Commercial or Manufacturing District with a maximum building height limitation, the maximum building height shall be increased by 20 feet or two stories, whichever is less.