N.Y. Comp. Codes R. & Regs. tit. 22, § 670.2
(3) An application for permission to withdraw an appeal subsequent to the calendar date must be supported by:
(iii) where appropriate, an explanation regarding why there was a delay in notifying the court of that event. Such applications shall be granted only in limited circumstances and upon a showing of good cause.
(b) Notice of change of circumstances.
For the purposes of the Practice Rules of the Appellate Division (22 NYCRR section 1250.2[c]), settlement includes, but is not limited to, any oral or written agreement or understanding which may, once memorialized, render a determination of the cause unnecessary.
(a) Withdrawal of an appeal which has been placed on the court’s calendar.