# The Measuring Instruments Regulations 2016, Paragraph 9


In case of a reduction of the voltage supply to a value below the lower operating limit as specified by the manufacturer, the taximeter shall:
— continue to work correctly or resume its correct functioning without loss of data available before the voltage drop if the voltage drop is temporary, i.e. due to restarting the engine;
— abort an existing measurement and return to the position ‘For Hire’ if the voltage drop is for a longer period.

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Source: https://www.legislation.gov.uk/uksi/2016/1153/schedule/1H/paragraph/9 (the official version)
Page: https://openlegislation.uk/measuring-instruments-regulations-2016/schedule-1H/paragraph-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.