N.Y. Real Property Tax Law § 489-CCCC
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(b) The following areas in the borough of Manhattan shall, except as otherwise provided in paragraph (d) of this subdivision and subdivision six of this section, be excluded areas as of July first, nineteen hundred ninety-two; provided, however, that if an application for a certificate of eligibility has been filed for commercial construction work in such areas on or before December thirty-first, nineteen hundred ninety-two and the recipient presents evidence satisfactory to the department of finance: (i) (A) for a new building or structure, that construction has been completed on a foundation, as described in approved plans, on or before June thirtieth, nineteen hundred ninety-three; or (B) for an existing building or structure, that at least five per centum of the minimum required expenditure has been made for commercial construction work, as described in approved plans, on or before June thirtieth, nineteen hundred ninety-three; and (ii) that all other requirements of this title have been met; then, a deferral of tax payments pursuant to subdivision four of section four hundred eighty-nine-bbbb of this title shall be granted for such commercial construction work, except that no deferral of tax payments shall be granted for commercial construction work on mixed-use property: