Regulation 15 General requirements for electrical connectionsI1

Every motor vehicle first used on or after 1st April 1991 shall be so constructed that every position lamp, side marker lamp, end-outline marker lamp and rear registration plate lamp with which the vehicle is fitted is capable of being switched on and off by the operation of one switch and, save as provided in paragraph (2), not otherwise.

Sub-paragraph (a) of paragraph (1) shall not prevent one or more position lamps from being capable of being switched on and off independently of any other lamp referred to in that sub-paragraph.