N.Y. Comp. Codes R. & Regs. tit. 22, § 671.2 – Duration of representation by counsel for defendant.

(a) in the trial court, until determination of the action or proceeding and until counsel shall have performed the additional duties imposed upon him by these rules; and
(b) in the appellate court, until entry of the order determining the appeal and until counsel shall have performed the additional duties imposed upon him by these rules. Thereupon such counsel's representation shall come to an end.

In every criminal action or proceeding specified in section 671.1 of this Part the duration of the representation by counsel for the defendant shall be as follows: