The FSA county office shall seal the voted ballots, challenged ballots found to be ineligible, spoiled ballots, register sheets, and summary sheets for the county in one or more envelopes or packages, plainly marked with the identification of the referendum, the date and the names of the county and State, and place them under lock and key in a safe place under the custody of the FSA county office for a period of 45 days after the referendum period. If no notice to the contrary is received by the end of such time, and after the ballots and other records have been examined by a representative of the State FSA office, the voted ballots and challenged ballots shall be destroyed, but the registers and county summary sheets shall be filed for a period of 5 years in the office of the FSA county office.