N.Y. Comp. Codes R. & Regs. tit. 9, § 5315.10
(h) If an independent certified public accountant who was previously engaged as the principal accountant to audit a gaming facility licensee’s financial statements resigns or is dismissed as such gaming facility licensee’s principal accountant, or another independent certified public accountant is engaged as principal accountant, a gaming facility licensee shall file a report with the commission within 10 days following the end of the month in which such event occurs, setting forth the following: