Regulation 30 I1

Every motor vehicle shall be so designed and constructed that the driver thereof while controlling the vehicle can at all times have a full view of the road and traffic ahead of the motor vehicle.

Instead of complying with the requirement of paragraph (1) a vehicle may comply with Community Directive 77/649, 81/643 F1, 88/366, 90/630 or, in the case of an agricultural motor vehicle, 79/1073.

All glass or other transparent material fitted to a motor vehicle shall be maintained in such condition that it does not obscure the vision of the driver while the vehicle is being driven on a road.