# The Radioactive Material (Road Transport) (Great Britain) Regulations 1996, Paragraph 4


The radiation level at 10 cm from any point on the external surface of any unpackaged instrument or article shall not exceed 0.1 mSv/h.

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