N.Y. Real Prop. Tax Law § 328

§ 328. Option to change to single appointed assessor. In any city or\ntown which has retained the office of elective assessor, the legislative\nbody of such city or town may adopt a local law providing that from and\nafter a date set forth in such local law, which date must be within one\nyear after the date on which such local law was adopted, there shall be\nbut one assessor, to be appointed as provided in section three hundred\nten of this title. The legislative body, in its discretion, may\ndetermine that a local law adopted pursuant to this section shall be\nsubject to a mandatory or permissive referendum, or not subject to a\nreferendum. Any such referendum shall be conducted in the manner\nprescribed in section twenty-three or twenty-four of the municipal home\nrule law, as the case may be. On December thirty-first of the year in\nwhich such local law shall take effect, the term or terms of all\nassessors then in office shall terminate.\n