(1) This section applies if a road user charge rate specified in Schedule 3 is increased under section 20 or by any other Act.
(2) Despite any other provision of this Act, a distance licence or supplementary licence for a motor vehicle whose gross laden weight is more than 3.5 tonnes issued before the increase comes into force is no longer valid after the expiry of 1 month from the date of the increase.
Section 21: substituted, on 11 August 2009, by section 6 of the Road User Charges Amendment Act 2009 (2009 No 27).