It stands to reason its for moving vehicles and if the rule has not been published then he should get away with it at court. Its like getting fined for eating red jellybabies - "What I hear you say!!!! you haven't heard about the law strictly forbidding this??"
"No, your Honour"
"That's no excuse! 3000QR fine! NEXT!!!, ah now, the case of walking on the cracks in the pavement"

I don't go to mythical places with strange men.
-- Douglas Adams, The Long Dark Tea-Time of the Soul.