N.Y. Gen. Mun. Law § 120-P
In any such city or village, whether acting severally or jointly, a copy of such contract, for construction mentioned in section one hundred twenty-c, with a copy of the determination required in section one hundred twenty-g, if the expenditures of such city or village to carry out such contracts are to be paid by taxes levied for the fiscal year in which such expenditures are to be made shall be published at least twice in one or more newspapers published therein, including the official newspaper or newspapers, if any, of such city or village, or posted in not less than five public places, and published at least twice in a newspaper circulating in such municipality if no newspaper is published therein. In the event that the municipality maintains a website, one of the posting requirements may be fulfilled by posting such information on the website. If, within fifteen days after the publication or posting of such contract and determination, a protest or protests against such contract shall be filed in the office of the clerk of such city or village signed either by not less than one-third of the governing body adopting such resolution or by a three per centum in number of the taxpayers thereof whose names appear on the last preceding assessment roll of real property, excluding special franchises, then such contract shall not become effective unless the governing body shall by a further resolution provide for the submission to the voters of a proposition to ratify such contract, nor unless, within sixty days after such publication or posting such proposition shall be adopted at a general election or at a special election to be called and held for that purpose, by a majority of the voters voting on such proposition. At any such election any person qualified to vote under the election law in general elections, who is a resident of the city or village, may vote. At least ten days' notice of any election under this section shall be given by the clerk of the city or village by publication at least twice in one or more newspapers, including the official newspaper or newspapers, if any, of such city or village, or by posting in at least five public places, if no newspaper is published therein. Such election may be held and the result canvassed and certified as may be required by any general or special law applicable to an election upon a proposition in any such city or village, or in the absence of any such law as may be prescribed by any general ordinance. The voting shall be by ballot, prepared in the form prescribed by the election law. The facts as to the filing and sufficiency of any protests under this section, and as to the calling, holding or result of any election which may be required or held under this section or under any other statute with respect to the authorization of any such improvement or the ratification of any ordinance authorizing the same, and all facts affecting the validity of any contract mentioned in section one hundred twenty-c, including the organizations or acts of any town or sewer district shall, for the purpose of this section, be conclusively determined by a resolution of the governing body of any such city, town or village. A copy of such resolution shall be published twice in one or more newspapers, including the official newspaper or newspapers, if any, of such city, town or village, or posted in not less than five public places if no newspaper is published therein, and the facts therein stated shall not be disputed in any action commenced after the expiration of ten days after such publication or posting involving the validity of such contract, or of any tax, assessment or other charge to meet any payment thereunder, and such contract shall be conclusively deemed to be valid unless entered into in violation of this section, section one hundred twenty or section one hundred twenty-c of this chapter.
N.Y. Gen. Mun. Law § 120-P