Regulation 12 Stopping of engine when vehicle stationary
(1)
An authorised person who has reasonable cause to believe that the driver of a vehicle that is stationary on a road is committing a stationary idling offence may, upon production of evidence of authorisation under regulation 6(3), require the driver to stop the running of the engine of that vehicle.
(2)
A person who fails to comply with a requirement under paragraph (1) is guilty of an offence and is liable on summary conviction to a fine not exceeding level 3 on the standard scale.