New York Consolidated Laws, Election Law - ELN § 10-112. Military voter;  voting

The military voter shall mark the military ballot provided for in this article in the same manner as an absentee ballot.  After marking the ballot, he or she shall fold such ballot and enclose it in the inner affirmation envelope bearing the military voter's affirmation on the outside of the envelope and seal the envelope.  He or she shall then sign the affirmation, with the blanks properly filled in.  The inner affirmation envelope containing the military ballot shall then be inserted in the outer envelope addressed to the appropriate board of elections, which shall be mailed or personally delivered to such board of elections of his or her county of residence within the time limits provided by this chapter.