(a)        As-of-right provisions

The provisions of this paragraph (a) shall apply to zoning lots with a lot area greater than 30,000 square feet, and which contain schools 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 New York City Department of Education.

On such zoning lots, up to 60,000 square feet of floor space within such school or, in Subarea D4 up to 100,000 square feet of floor space within such school, shall be exempt from the definition of floor area.

(b)        Special permit provisions

In Manufacturing Districts within Subareas B1 or B2, the Board of Standards and Appeals may permit the allowable community facility floor area ratio for schools to be increased to 4.8, provided that the Board finds that the distribution of bulk on the zoning lot will not unduly obstruct the access to light and air in and to adjoining properties or public streets, and will result in satisfactory site planning and satisfactory urban design relationships of buildings to adjacent streets and the surrounding area. The Board may prescribe appropriate conditions and safeguards to minimize adverse effects on the character of the surrounding area.