Nonrecord materials or materials not included within the definition of records as contained in this chapter may, if not otherwise prohibited by law, be destroyed at any time by the agency in    possession of such materials without the prior approval of the administrator. The administrator may formulate procedures and interpretation to guide in the disposition of nonrecord materials. Records determined to be subject to final disposition under section 54-46-08 and not found to be of value as archival resources under section 54-46-08.1 must be destroyed by any suitable means as determined by the administrator.