Regulation 27

A direction indicator shall be on the external surface of a vehicle.

A direction indicator intended to indicate a right hand turn shall be fitted only to the right of the longitudinal axis of the vehicle and one intended to indicate a left hand turn shall be fitted only to the left of that axis.

No part of the illuminated area of a direction indicator shall be more than 1.5 metres above the level of the ground when the vehicle is unladen.

The Registrar may, subject to such terms and conditions as he may impose, approve a height of more than 1.5 metres but below 2.0 metres.

Every direction indicator shall be so designed and fitted that the outermost point of its illuminated area which is furthest from the longitudinal axis of the vehicle is not more than 400 millimetres nearer to the axis than is the outermost point of the vehicle which is comprised in the overall width of the vehicle on the side on which the indicator is placed.

Where a side indicator is fitted on a side of a motor vehicle in accordance with rule 26(3) or (4), the direction indicator shall be so fitted that the distance between the foremost part of the motor vehicle which is comprised in the overall length of the motor vehicle and the rearmost part of the illuminated area of that indicator is not more than 1/3 of the overall length of the motor vehicle or, where the motor vehicle is the drawing vehicle forming part of an articulated vehicle, not more than 1/3 of the overall length of the articulated vehicle.

Every direction indicator shall be so fitted that, when not in operation, it will not be likely to mislead the driver of any other vehicle or any person controlling traffic on a road.

Every direction indicator fitted to a side of a vehicle together with every direction indicator on that side of any trailer drawn by the vehicle, while so drawn, shall be operated by one and the same switch and not otherwise.