N.Y. General City Law § 21-e

§ 21-e. Operating assistance for water-works corporations in certain\ncities. Each city having a population of more than one million may\nprovide operating assistance to a water-works corporation subject to the\nprovisions of the public service law which provides water service in\nsuch city for the purpose of reducing or eliminating disparity between\nrates charged for such service by the municipal water supply system of\nsuch city and rates charged by such water-works corporation, and in\nfurtherance of such purpose the chief executive officer of such city may\nenter into an agreement with such water-works corporation and expend\nsuch sums as may be appropriated therefor so as to effect a reduction of\nrates of such water-works corporation.\n