# The Traffic Signs Regulations and General Directions 2016, Paragraph 1

Extent: E+W+S

(1) A reference to a time, or to times, of the day may be shown as, or varied to, the following—
(a) a period of time expressed as “7.30 – 9.00 am”, “7 - 9 am”, “7.30 am – 6 pm”, “4 – 7 pm”, “4.00 – 6.30 pm”, “8 pm – 6 am”, “8 pm – 6 am next day” or any other time period and which may include the expression “Midnight”, “M’night”, “Midday” or “Noon” ;
(b) “At any time”, “at any time”, “At all times”, “at all times”, “At other times”, “at other times”, “Additional times” or “additional times”;
(2) The time of day must be shown in the 12-hour clock format.

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Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/18/part/1/paragraph/1 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-18/part-1/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.