# The Measuring Instruments Regulations 2016, Paragraph 9.5


Unless specified otherwise in an instrument-specific Schedule, the scale interval for a measured value shall be in the form 1 × 10n, 2 × 10n, or 5 × 10n, where n is any integer or zero. The unit of measurement or its symbol shall be shown close to the numerical value.

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Source: https://www.legislation.gov.uk/uksi/2016/1153/schedule/1A/paragraph/9.5 (the official version)
Page: https://openlegislation.uk/measuring-instruments-regulations-2016/schedule-1A/paragraph-9.5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.