# The Radioactive Material (Road Transport) (Great Britain) Regulations 1996, Paragraph 6


In the case of a manufactured article in which the sole radioactive material is unirradiated natural uranium, unirradiated depleted uranium or unirradiated natural thorium, the outer surface of the uranium or thorium must be enclosed in an inactive sheath made of metal or some other substantial material.

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Source: https://www.legislation.gov.uk/uksi/1996/1350/schedule/4/paragraph/6 (the official version)
Page: https://openlegislation.uk/radioactive-material-road-transport-great-britain-regulations-1996/schedule-4/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.