In R1, R2, R3-1, R3A, R3X, R4-1 and R4A Districts, the provisions of this Section shall apply to zoning lots containing buildings used for:

(a)        ambulatory diagnostic or treatment health care facilities, as listed in Section 22-14 (Use Group 4), 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 service as listed under the definition of school in Section 12-10 (DEFINITIONS), except where:

(1)        such zoning lot contains buildings used for houses of worship; or

(2)        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.

The minimum lot area for such zoning lots containing ambulatory diagnostic or treatment health care facilities shall be 5,700 square feet, and the minimum lot area for such zoning lots containing child care services shall be 10,000 square feet. Where such uses are located on the same zoning lot, the applicable lot area requirement shall be allocated separately to each such use. In addition, each such zoning lot shall have a minimum lot width of 60 feet. Such lot width shall be applied as set forth in the definition of lot width in Section 12-10, provided that such lot width shall also be met along at least one street line of the zoning lot. No building, or portion thereof, shall be permitted between opposing side lot lines where such lot lines would be nearer to one another at any point than 60 feet.

For such zoning lots containing multiple buildings used in any combination for ambulatory diagnostic or treatment health care facilities, child care services or residences, the applicable minimum lot area and lot width requirements shall be allocated separately to each such building.