(1) A traffic control device of a kind mentioned in these Rules has effect for these Rules if--(a) the device is on a road, and(b) the device complies substantially with these Rules.Note 1 :
"Road" includes a road related area--see rule 11(2).Note 2 : Rule 322(1) and (2) explain the meaning of a traffic control device on a road.
(2) A traffic control device is taken to comply substantially with these Rules unless the contrary is proved.