N.Y. R.R. Law § 146
Whenever a railroad corporation of this or of any other state or states whose line of road lies partly in this state and partly in another state or states, shall have executed a mortgage upon its entire line of railroad, and a sale of the entire line of road under such mortgage shall have been or may hereafter be ordered, adjudged and decreed by a court of competent jurisdiction of the state or states, or by a court of the United States sitting within the state or states in which the greater part of such line of railroad may be situated, upon the confirmation of such judgment or decree, and of the sale made thereunder, by the supreme court of this state or by the circuit court of the United States in the judicial district in which some part of such line of road is situated, such sale shall operate to pass title to the purchaser, of that part of the line of railroad lying in this state, together with its appurtenances and franchises, with the same force and effect as if the judgment or decree under which such sale is had, had been made by a court of competent jurisdiction of this state. Such judgment or decree and sale may be so ordered, adjudged, decreed or confirmed in any action or proceeding heretofore or hereafter brought in the supreme court, or in a court of the United States sitting in this state, for the foreclosure of such mortgage, or in aid of an action for that purpose in such other state or states, if it shall appear that such confirmation is for the interest of the public and of the parties, due and lawful provision being made for and in respect of any liens upon that part of the line of road or other property sold situate in this state, and for such costs, expenses and charges as may appear to be just and lawful. If a receiver of the entire line of such railroad shall have been, or may hereafter be appointed by such court of competent jurisdiction of the state in which the greater part of the line of railroad is situated, or by a court of the United States sitting in such other state, such receiver may perform, within this state, the duties of his office not inconsistent with the laws of this state, and may sue and be sued in the courts of this state.
N.Y. R.R. Law § 146