N.Y. Village Law § 14-1436
The board of sewer commissioners may contract for the connection of the sewerage system thereof with the sewerage system of another village, or of a town, or city, or of a sewer district or wastewater disposal district established under the provisions of article twelve of the town law; or jointly with such other village or a town or city or sewer district or wastewater disposal district established as aforesaid, may construct, maintain, operate or use sewers, outlets or disposal works or private on-site wastewater disposal systems; or may contract with any such other village, or town, or city, or sewer district or wastewater disposal district established as aforesaid for the right to construct and maintain through any such other village, town or city, or sewer district or wastewater disposal district established as aforesaid, an outlet sewer, including the right to acquire real property for such sewer outlet, which thereupon may be acquired either at private sale or by condemnation as authorized by this act. No sewerage system of any other village, town or sewer district or wastewater disposal district thereof, or city, shall be constructed in any village without the approval of the board of sewer commissioners of the village in which such sewerage system shall be constructed, and no such contract shall be made unless a resolution therefor be adopted by the trustees of the village constructing the sewerage system, stating the maximum expense.
N.Y. Village Law § 14-1436