No person shall cause or permit any vehicle other than a hackney carriage to wait on any stand for hackney carriages during any period for which that stand has been appointed, or is deemed to have been appointed, by a district council under the provisions of section 63 of this Act.
Notice of the prohibition in this section shall be indicated by such traffic signs as may be prescribed or authorised for the purpose by the Secretary of State in pursuance of his powers under section 64 of the Road Traffic Regulation Act 1984.
If any person without reasonable excuse contravenes the provisions of this section, he shall be guilty of an offence.
In any proceedings under this section against the driver of a public service vehicle it shall be a defence to show that, by reason of obstruction to traffic or for other compelling reason, he caused his vehicle to wait on a stand or part thereof and that he caused or permitted his vehicle so to wait only for so long as was reasonably necessary for the taking up or setting down of passengers.