N.Y. Comp. Codes R. & Regs. tit. 22 § 1400.1
This Part shall apply to all attorneys who, on or after November 30, 1993, undertake to represent a client in a claim, action or proceeding, or preliminary to the filing of a claim, action or proceeding, in either Supreme Court or Family Court, or in any court of appellate jurisdiction, for divorce, separation, annulment, custody, visitation, maintenance, child support, or alimony, or to enforce or modify a judgment or order in connection with any such claims, actions or proceedings. This Part shall not apply to attorneys representing clients without compensation paid by the client, except that where a client is other than a minor, the provisions of section 1400.2 of this Part shall apply to the extent they are not applicable to compensation.
N.Y. Comp. Codes R. & Regs. Tit. 22 § 1400.1