# The Civil Enforcement of Parking Contraventions (Approved Devices) (Wales) Order 2008, Paragraph 3


The device and visual counter must —
(a) be synchronised with a suitable independent national standard clock; and
(b) be accurate within plus or minus 10 seconds over a 14-day period and re-synchronised to the suitably independent national standard clock at least once during that period.

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Source: https://www.legislation.gov.uk/wsi/2008/620/schedule/paragraph/3 (the official version)
Page: https://openlegislation.uk/civil-enforcement-of-parking-contraventions-approved-devices-wales-order-2008/schedule/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.