N.Y. Comp. Codes R. & Regs. tit. 19, § 143-3.5 – Acceptance of XML documents.

(a) An XML document is not accepted for filing at the time it is received by the central filing office's XML system, even if said XML system then sends a signal to the remitter indicating that the remitter's XML transmission has been received. An XML document is accepted for filing only after the XML document is analyzed by the central filing office's XML system, and the central filing office determines that:
1. (1) the XML document is machine-readable;
2. (2) all required elements of the transmission have been received in an approved format; and
3. (3) the XML document is not to be refused under section 143-3.6 of this Subpart.
(b) The central filing office may from time to time determine the days and times during which the central filing office's XML system will receive XML transmissions, and the days and times during which the central filing office's XML system will analyze XML documents in the manner described in subdivision (a) of this section. The days and times during which the central filing office's XML system will analyze XML documents will not necessarily be the same as the days and times during which the central filing office's XML system will receive XML transmissions, and an XML transmission will not necessarily be analyzed on the same business day that it is received by the central filing office's XML system.
(c) Upon acceptance of an XML document for filing, the central filing office shall provide electronic notice to the remitter to confirm such acceptance, and to confirm the date and time of filing.