Greater London Authority Act 1999

10 (1) A charging scheme shall specify or describe the events by reference to the happening of which a charge is imposed by the charging scheme in respect of a motor vehicle being kept or used on a road in a charging area.

(2) Any charge imposed by a charging scheme in respect of the keeping of a motor vehicle on a road in a charging area must also have effect in respect of the use of the motor vehicle in that charging area.

(3) A charging scheme may make provision in relation to the manner in which charges are to be made, collected, recorded or paid.

(4) The charges that may be imposed by a charging scheme include different charges (which may be no charge) for—

(a) different days;

(b) different times of day;

(c) different parts of a charging area;

(d) different distances travelled;

(e) different classes of motor vehicles.

(5) In setting the rates of charge, regard may be had to the purposes for which the charging authority is to apply the net proceeds of the scheme.