Before the polls are opened at the central polling place on the day of an election, the town clerk shall seal up the 2 duplicate copies of the checklist for each additional polling place lodged with the clerk by the supervisors with the number of blank ballots determined by the moderator to be likely to be sufficient for the voters expected to vote at the additional polling place. If the moderator has authorized the counting of votes and thereby authorized the processing of absentee ballots at the additional polling place, the absentee ballots of those persons qualified to vote in that additional polling place shall be sealed up along with a list of those persons qualified to vote at that additional polling place to whom absentee ballots have been sent pursuant to N.H. Rev. Stat. § 657:15. This package shall be prepared and sealed in the presence of the moderator and selectmen and shall be delivered immediately to the assistant moderator of the additional polling place by 2 election officers designated by the moderator.