Part 4731.8000 - PHYSICAL PROTECTION OF CATEGORY 1 OR CATEGORY 2 QUANTITIES OF RADIOACTIVE MATERIALA. Parts 4731.8010 to 4731.8090 apply to any person who, under the regulations in this chapter, possesses or uses at any site, an aggregated category 1 or category 2 quantity of radioactive material.B. Parts 4731.8100 to 4731.8125 apply to any person who, under the regulations of this chapter: (1) transports or delivers to a carrier for transport in a single shipment, a category 1 or category 2 quantity of radioactive material; or(2) imports or exports a category 1 or category 2 quantity of radioactive material; the provisions only apply to the domestic portion of the transport.Minn. R. agency 144, ch. 4731, PHYSICAL PROTECTION OF CATEGORY 1 AND CATEGORY 2 QUANTITIES OF RADIOACTIVE MATERIAL, pt. 4731.8000