1. The board of elections shall cause all military ballots received by it before the close of the polls on election day and all ballots contained in envelopes showing a cancellation mark of the United States postal service or a foreign country's postal service, or showing a dated endorsement of receipt by another agency of the United States government or are signed and dated by the voter and one witness thereto, with a date which is ascertained to be not later than the day of the election and received by such board of elections not later than seven days following the day of a primary election and not later than thirteen days following the day of a general or special election to be cast and counted. 2. The board of elections shall thereafter process such ballots in the manner provided in this chapter for processing absentee ballots.
New York Legal Code