Part I Requirements relating to obligatory main-beam headlamps and to optional main-beam headlamps to the extent specified in part ii

Number–

A solo motor bicycle and motor bicycle combination:

A motor vehicle with three wheels, other than a motor bicycle combination, first used before 1st January 1972:

A motor vehicle with three wheels, other than a motor bicycle combination, first used on or after 1st January 1972 and which has an unladen weight of not more than 400 kg and an overall width of not more than 1300 mm:

Position–

Lateral–

Maximum separation distance between a pair of main-beam headlamps:

Where one main-beam headlamp is required to be fitted:

On the centre-line of the motor vehicle (disregarding any sidecar forming part of a motor bicycle combination), or

At any distance from the side of the vehicle (disregarding any sidecar forming part of a motor bicycle combination) provided that a duplicate lamp is fitted on the other side so that together they form a matched pair. In such a case, both lamps shall be treated as obligatory lamps.

Vertical:

Angles of visibility:

Alignment:

Markings–

A motor vehicle first used before 1st April 1986:

A three-wheeled motor vehicle, not being a motor bicycle combination, first used on or after 1st April 1986 and having a maximum speed not exceeding 50 mph:

A solo motor bicycle and a motor bicycle combination:

Size of illuminated area:

Colour:

Wattage–

A motor vehicle, other than a solo motor bicycle or a motor bicycle combination, first used before 1st April 1986:

A solo motor bicycle and a motor bicycle combination–

having an engine exceeding 250 cc:

Intensity: