Part IRequirements Relating to Obligatory Dim-Dip Devices and Running Lamps

3.  The electrical connections to the obligatory dim-dip device shall be such that the light output specified in paragraph 1 is automatically emitted whenever the following four conditions are satisfied, namely—

(a)the engine is running, or the key or devices which control the starting or stopping of the engine are in the normal position for when the vehicle is being driven;

(b)the obligatory main beam and dipped beam headlamps are switched off;

(c)any front fog lamp fitted to the vehicle is switched off; and

(d)the obligatory front position lamps are switched on.