The maximum floor area ratio for all uses shall be 2.0.

However, for zoning lots in Subareas A and B1, up to a total of 100,000 square feet of floor space, within a public school, constructed in whole or in part pursuant to an agreement with the New York City School Construction Authority and subject to the jurisdiction of the Department of Education, shall be exempt from the definition of floor area. Zoning lots within Subarea A and B1 that are contiguous or would be contiguous but for their separation by a street, may be considered one zoning lot for the purpose of applying these special floor area regulations.