N.Y. Village Law § 16-1602
If the proposition is to be submitted at an annual election, notice thereof shall be given by the board of trustees by posting notices in five public places in the village, and publishing the same in the official newspaper at least twenty days before such annual election. In the event that the village maintains a website, one of the posting requirements may be fulfilled by posting such information on the website. If it is to be submitted at a special election, notice of such election and of the submission of such proposition thereat, shall be given in the same manner and for the same time as for the submission of such a proposition at an annual election. Such a special election shall be held by the same officers and conducted and the result canvassed in the same manner as provided by law for an annual election in such village.
N.Y. Village Law § 16-1602