N.Y. Comp. Codes R. & Regs. tit. 18 § 398-3.1
No separate application for SSPNA shall be required or accepted by NYS. Eligibility for SSPNA is contingent upon an individual or couple residing in NYS being found eligible for federal SSI benefits who meets all other State eligibility criteria for receipt of a prospective SSPNA benefit as of such time that the federal SSA electronic data file containing such individual's or couple's relevant SSI eligibility determination is transmitted to NYS via the SDX with federal payment status codes as defined in section 398-2.1 of this Part. Eligibility for SSPNA benefits will be deemed to begin the same month in which ongoing SSI eligibility was established. SSPNA benefits are payable as of the month that SSI benefits begin.
N.Y. Comp. Codes R. & Regs. Tit. 18 § 398-3.1