The Deregulation (Parking Equipment) Order 1996
The Road Traffic Regulation Act 1984 contains various provisions giving local authorities power to make orders regulating the use of on and off street parking places. Such orders may require anyone wishing to park a vehicle to use a parking meter, pay and display ticket machine or other parking device such as a voucher or permit, which is capable of indicating how much has been paid and the period for which the vehicle may be parked.