Regulation 18

Where road works are in progress or where for some other reason the width of the road is temporarily reduced, the traffic signs in diagrams 7 and 8 in Part I of the Schedule may be used to control traffic.

Nothing in this rule shall prevent the use for the purpose stated in paragraph (1) of devices which on 15th November 1991 are already in the possession of the Government, any statutory body which has the lawful authority to break up a road, or the contractors engaged in the business of marking and repairing roads.