# Council Regulation (EEC) No 3821/85 of 20 December 1985 on recording equipment in road transport, Division 12.4: Driver activity data

Extent: E+W+S+N.I.

084 The recording equipment shall record and store in its data memory whenever there is a change of activity for the driver and/or the co-driver, and/or whenever there is a change of driving status, and/or whenever there is an insertion or withdrawal of a driver or workshop card:
the driving status (CREW, SINGLE),
the slot (DRIVER, CO-DRIVER),
the card status in the relevant slot (INSERTED, NOT INSERTED) (see Note),
the activity (DRIVING, AVAILABILITY, WORK, BREAK/REST),
the date and time of the change.
085 The data memory shall be able to hold driver activity data for at least 365 days.
086 When storage capacity is exhausted, new data shall replace oldest data.

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Source: https://www.legislation.gov.uk/eur/1985/3821/annex/2/division/III/division/12/division/12.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-1985-3821/annex-2/division-III/division-12/division-12.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.