The absentee ballot affidavits and application forms processed by the moderator as provided in N.H. Rev. Stat. § 659:50, the absentee ballots challenged and rejected as provided in N.H. Rev. Stat. § 659:51 and N.H. Rev. Stat. § 659:53, and the qualified voter affidavits as provided in N.H. Rev. Stat. § 654:12 and any other documentary proof of qualifications retained by the town or city clerk, the supervisors of the checklist, or other election official shall be preserved in accordance with N.H. Rev. Stat. § 33-A:3-a. Qualified voter and voter registration affidavits shall be retained for the period set forth in N.H. Rev. Stat. § 33-A:3-a, and other materials may be destroyed after the election is settled and all appeals have expired or one year after the election, whichever is longer.