Subject to subsection (2) below, nothing in sections 68 to 78 of this Act shall require a vehicle to carry separate lamps for different purposes, if it carries a lamp satisfying all the requirements which would be applicable to separate lamps carried by it for those purposes.

Subsection (1) above shall not apply in relation to any requirement to carry a headlamp under section 68(2) of this Act, but regulations may authorise the combination in a single unit of such a lamp and a lamp required to be carried by section 68(1)(a) of this Act.

Where a vehicle's tail lamp is so constructed that, when not showing a light, it is an efficient red reflector facing to the rear and complying with any regulations made for the purposes of section 69 of this Act and for the purposes of this subsection which apply to the vehicle, it shall be treated for those purposes as being such a reflector when it is, as well as when it is not, showing a light.