The archivist shall keep a record of all orders authorizing the disposition of records. Orders shall be in writing and signed by the Records Disposition Panel, and shall identify the records referred to in them. A certified copy of an order shall be admissible in evidence in any court or proceeding. The records shall be preserved in the Office of the Archivist and shall be open to public inspection. Proper records shall be kept by the archivist showing where records or reproductions of them have been stored, and also identifying any that have been ordered destroyed, sold for salvage or disposed of by gift or otherwise.