For zoning lots in Subdistrict A of this Chapter that do not contain residences, the maximum floor area ratio shall be 10.0; no floor area bonuses shall apply.
For zoning lots in Subdistrict A containing residences, the maximum floor area ratio shall be 9.0 plus an amount equal to 0.25 times the non-residential floor area ratio provided on the zoning lot, provided that such base floor area ratio does not exceed 10.0.
Any floor space designated for use as a school shall be exempted from the definition of floor area for the purposes of calculating the permitted floor area ratio for community facility uses and the total maximum floor area ratio of the zoning lot, provided that such school is either:
(a) a public school, subject to the jurisdiction of the New York City Department of Education, pursuant to an agreement accepted by the School Construction Authority; or
(b) a charter school, subject to the New York State Education Law, pursuant to an agreement with a charter school organization.