Regulation 20

10 mSv/h at any point on the external surface of any package or overpack, provided that —

the vehicle is equipped with an enclosure which, during routine transport, prevents the access of unauthorised persons to the interior of the enclosure;

provisions are made to secure the package or overpack so that its position within the vehicle remains fixed during routine transport; and

there are no loading or unloading operations between the beginning and end of the shipment;

2 mSv/h at any point on the outer surfaces of the vehicle, including the upper and lower surfaces, or in the case of an open vehicle, at any point on the vertical planes projected from the outer edges of the vehicle, on the upper surface of the load, and on the lower external surface of the vehicle; and

0.1 mSv/h at any point 2 m from the vertical planes represented by the outer lateral surfaces of the vehicle, or, if the load is transported in an open vehicle, at any point 2 m from the vertical planes projected from the outer edges of the vehicle.

any person other than the driver and such other assistants authorised by the carrier to travel in the vehicle if the material is contained in packages, overpacks, tanks or freight containers assigned to category II-YELLOW or III‑YELLOW; and

any person who is below 18 years of age to travel in the vehicle.