N.Y. EXC Law § 168

§ 168. Notices to attorneys at law by state bodies or officers. 1.\nWhenever a person is involved as a party in a proceeding before any body\nor officer exercising quasi-judicial or administrative functions, and an\nattorney at law has filed a notice of appearance in such proceeding on\nbehalf of such person, a copy of all subsequent written communications\nor notices to such person in such proceeding (other than subpoenas)\nshall be sent to such attorney at law, and if any such subsequent\nwritten communication or notice is sent to the party in the proceeding,\na copy of the same shall be sent to the attorney at law at the same\ntime. Every such body or officer is authorized to provide by rule or\nregulation for the manner in which compliance with the requirements of\nthis section shall be effected, including, but not limited to, the form\nand content of notices of appearance, the manner in which an attorney at\nlaw shall file his notice of appearance in a proceeding, and the manner\nin which written communications or notices shall be sent to the attorney\nat law.\n 2. For the purpose of this section:\n (a) "person" shall mean one or more individuals, partnerships,\ncorporations or associations;\n (b) "proceeding" shall mean any quasi-judicial or administrative\nprocedure instituted by a written application by a person to a body or\nofficer, by a notice of assessment given by a body or officer to a\nperson, by a written complaint addressed by a body or officer or\ntransmitted by a body or officer to a person, or by a notice of any\nhearing before a body or officer whether or not such hearing is\nprescribed by statute.\n 3. This section shall not apply to preliminary investigations.\n