# The Radioactive Material (Road Transport) (Great Britain) Regulations 1996, Paragraph 2


The Transport Index (TI) based on nuclear criticality control shall be obtained by dividing the number 50 by the value of N derived using the procedures specified in paragraph 6 of Schedule 7 (i.e., TI=50/N). The value of the Transport Index (TI) for nuclear criticality control may be zero, provided that an unlimited number of packages is subcritical (i.e., N is effectively equal to infinity).

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Source: https://www.legislation.gov.uk/uksi/1996/1350/schedule/17/paragraph/2 (the official version)
Page: https://openlegislation.uk/radioactive-material-road-transport-great-britain-regulations-1996/schedule-17/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.