New York Codes, Rules and Regulations
Title 22 - JUDICIARY
Subtitle A - JUDICIAL ADMINISTRATION
Chapter II - UNIFORM RULES FOR THE NEW YORK STATE TRIAL COURTS
Part 207 - Uniform Rules For The Surrogate's Court
Section 207.32 - Identification of trial counsel

(a) Where the attorney of record for any party arranges for another attorney to conduct the trial, the trial counsel must be identified in writing to the court and all parties within 10 days after the filing of the notice of trial. The notice must be signed by both the attorney of record and the trial counsel.

(b) After trial counsel is designated as provided above, no substitution shall be permitted unless the substitute counsel is available to try the case on the day scheduled for trial. Written notice of such substitution shall be given promptly to the court and all parties.