Except as expressly modified by the provisions of this Chapter, the regulations applying to an R10 District shall apply in subzones A-1, A-2, A-3, A-5 and A-6 of the Special Battery Park City District.

Notwithstanding any other provision of this Resolution, developments and enlargements may only be constructed in subzone A-4 in accordance with certifications given by the City Planning Commission. Residential open space in subzone A-4 shall be subject to the provisions of Sections 12-10 (DEFINITIONS) and 23-12 (Permitted Obstructions in Open Space). For every dwelling unit there shall be a minimum of 55.0 square feet of open space. All other provisions of this Chapter with respect to Zone A shall not apply to developments or enlargements in subzone A-4 unless otherwise indicated.