CONVENTION ON ROAD TRAFFIC
The Contracting Parties, desiring to facilitate international road traffic and to increase road safety through the adoption of uniform traffic rules, have agreed upon the following provisions:
Chapter II
RULES OF THE ROAD
ARTICLE 33
Rules of lighting of other vehicles than mentioned in Article 32 and of certain road users
1. Every vehicle or combination of vehicles to which the provisions of Article 32 of this Convention do not apply shall, when on a road between nightfall and dawn, show at least one white or selective-yellow light to the front and at least one red light to the rear. Where there is only one lamp at the front or only one lamp at the rear, the lamp shall be placed on the centre-line of the vehicle or on the side opposite to that corresponding to the direction of traffic.
(a) Handcarts, i.e., carts drawn or pushed by hand, shall show at least one white or selective-yellow light to the front and at least one red light to the rear. These two lights may be emitted by a single lamp placed on the side opposite to that corresponding to the direction of traffic. Lights shall not be required on handcarts not exceeding 1 m in width.
(b) Animal-drawn vehicles shall show two white or selective-yellow lights to the front, and two red lights to the rear. Domestic legislation may, however, make it permissible for such vehicles to show only one white or selective-yellow light to the front and only one red light to the rear. The lamps shall in both cases be placed on the side opposite to that corresponding to the direction of traffic. If the lamps described above cannot be attached to the vehicle, they may be carried by an escort walking immediately alongside the vehicle, on the opposite side to that corresponding to the direction of traffic. Furthermore, animal-drawn vehicles shall be fitted with two red reflex-reflectors to the rear, as close as possible to the outer edges of the vehicle. Lights shall not be required on animal-drawn vehicles not exceeding 1 m in width. However, a single reflex-reflector shall in this case be placed at the rear on the side opposite to that corresponding to the direction of traffic, or centrally.
2. (a) When moving along the carriageway by night:
(i) Groups of pedestrians led by a person in charge or forming a procession, must display, on the side opposite to that appropriate to the direction of traffic, at least one white or selective-yellow light to the front and a red light to the rear, or an amber light in both directions;
(ii) Drivers of draught, pack or saddle animals, or of cattle, must display, on the side opposite to that appropriate to the direction of traffic, at least one white or selective-yellow light to the front and a red light to the rear, or an amber light in both directions. These lights may be displayed by a single device.
(b) The lights referred to in subparagraph (a) of this paragraph are, however, not required within an appropriately lit built-up area.