N.Y. Comp. Codes R. & Regs. tit. 22, § 145.1
(b) IYC-eligible case shall refer to both of the following when they are simultaneously pending in Westchester County: a criminal case in a local criminal court or in the County Court and a case in the Family Court in which a respondent therein is a defendant in such criminal case and he or she was under 21 years of age at the time of the alleged commission of an offense prosecuted in such criminal case. An IYC-eligible case also shall refer to: