N.J. Stat. § 19:10-1: Custodial officer to preserve two years

All petitions of nomination, affidavits attached thereto, acceptances, objections thereto and determinations of officers or courts relative to such objections and all other documents relating to elections not otherwise provided for, shall be preserved by the officer with whom they have been filed for two years from any election at which the candidates named therein are to be voted for.