In lower density growth management areas other than R6 and R7 Districts in Community District 10, Borough of the Bronx, the Chairperson of the City Planning Commission may modify the amount of accessory off-street parking required pursuant to Section 25-31 (General Provisions), or the parking regulations of paragraphs (b)(3), (b)(4), and (b)(5) of Section 25-624 (Special parking regulations for certain community facility uses in lower density growth management areas), for any enlargement of a building containing a use listed in paragraphs (a) or (b) of this Section, or a change of use to, or an extension of,  such use, provided that the applicant submits a site plan that demonstrates to the Chairperson that the location of the existing building on the zoning lot impedes compliance with the parking requirements of Sections 25-31 and 25-624, and that the Chairperson certifies to the Department of Buildings, that the enlargement, extension or change of use complies with such requirements to the maximum extent feasible.

(a)        Ambulatory diagnostic or treatment health care facilities listed under Use Group III(B), except where such zoning lot contains buildings used for hospitals, as defined in the New York State Hospital Code, or long-term care facilities; and

(b)        Child care services listed under the definition of school in Section 12-10 (DEFINITIONS), except where such zoning lot contains buildings used for houses of worship and, for zoning lots that do not contain buildings used for houses of worship, where the amount of floor area used for child care services is equal to 25 percent or less of the amount of floor area permitted for community facility use on the zoning lot.