N.Y. TCP Law § 46

§ 46. Corporations may contract with other cities, towns or villages;\ncertificate of extension; effect of merger. When any such corporation\nhas entered into a contract with the authorities of any city, town or\nvillage not mentioned in its certificate of incorporation, but situated\nin the same county as the city, towns or villages mentioned therein or\nin an adjoining county, to supply it with pure and wholesome water, it\nmay file a certificate which shall be entitled and endorsed "certificate\nof extension of territory of .......................... pursuant to\nsection forty-six of the transportation corporations law" (the blank\nspace being filled in with the name of the corporation) and which shall\nstate:\n 1. The name of the corporation, and, if it has been changed, the name\nunder which it was originally incorporated.\n 2. The name of such other city, town or village to be so supplied with\nwater.\n Such certificate shall be signed and acknowledged by the president or\na vice-president and the secretary or an assistant secretary of the\ncorporation, who shall make and annex an affidavit that they have been\nauthorized to execute and file the same by the vote of a majority of the\ndirectors of the corporation.\n Such certificate shall be filed in each public office in which the\ncertificate of incorporation is filed. Any corporation which has\nheretofore filed or shall file such certificate as aforesaid may\nthereupon supply any such city, town or village with water in the same\nmanner and with the same rights and subject to the same requirements as\nif it had been named in the original certificate of incorporation, and\nas if such certificate of incorporation had had annexed thereto a\nconsent to the formation of the corporation, signed and acknowledged by\nthe local authorities of such municipal corporation, as defined in\nsection forty-one of this chapter.\n The right of merger of waterworks corporations shall not be limited to\ncorporations operating in the same or adjoining counties, and if a\nwaterworks corporation be merged pursuant to law with another waterworks\ncorporation operating in the state, any municipal corporation or\npolitical subdivision of the state, and any public officer, board or\nbody, authorized by statute to contract with such a merged corporation,\nshall have power and authority to contract and deal with the possessor\ncorporation in the same manner and with the same effect as with such\nmerged corporation.\n