# The Railways and Other Guided Transport Systems (Safety) Regulations 2006, Paragraph 3: Measurement units for NRVs and CSTs


The measurement units for NRVs must be expressed in compliance with the mathematical definition of risk. The consequences of accidents which must be considered for each of the risk categories are the FWSIs.

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Source: https://www.legislation.gov.uk/uksi/2006/599/schedule/11/paragraph/3 (the official version)
Page: https://openlegislation.uk/railways-and-other-guided-transport-systems-safety-regulations-2006/schedule-11/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.