In the East River Subdistrict, the basic maximum residential floor area ratio for zoning lots containing standard residences shall be as set forth in the following table. On Parcels B, C, and F, the maximum residential floor area ratio for zoning lots containing qualifying affordable housing or qualifying senior housing shall be as set forth in Section 23-22 (Floor Area Regulations for R6 Through R12 Districts) for R10 Districts. For developments or enlargements on qualifying transit improvement sites, a floor area bonus for mass transit station improvements may be granted by the City Planning Commission pursuant to the provisions of Section 66-51 (Additional Floor Area for Mass Transit Station Improvements). No other floor area bonuses shall apply. For the purposes of this paragraph, defined terms additionally include those in Section 66-11 (Definitions).