All screenings, whether from seed conditioning plants or other sources, represent both a valuable and potentially hazardous product. Their movements are restricted as follows:
(1) The viability of prohibited noxious weed seed as defined in 80-5-120 shall be destroyed before screenings are utilized in feed or in any other way in which they may propagate their kind. However, if these screenings are sold for feed, it shall be the responsibility of the feed buyer to haul under a tarp cover or other tight container until the provisions of this part are met.
(2) The department may adopt rules to restrict or exempt from restriction the holding and movement of screenings when the public interest is served by so doing.