The board of trustees may, by resolution, determine to extend water mains outside the village. Such resolution shall contain a general description of the proposed extension and the estimated expense thereof and the amount thereof, if any, to be expended by the village. If the resolution be adopted, the board of water commissioners shall make the extension accordingly. If such extension is made, the board of water commissioners shall adopt rules, regulations and rates to apply to all consumers outside of the village.
New York Legal Code