If in any city having a population of fifty thousand or more there now exists or shall hereafter be created a board, body or officer having jurisdiction of matters pertaining to water supply such board, body or officer shall have and may exercise such power, jurisdiction and authority in enforcing the laws of the state and the orders, rules and regulations of the commission as may be prescribed by statute or by the commission.
N.Y. Pub. Serv. Law § 89-O