Is it obligatory to also install parking lights on a vehicle that has clearance lights installed?

1. ANo. On a vehicle that has clearance lights installed there is no obligation to install parking lights.
2. BYes. The clearance lights are of a different colour, and they cannot replace the parking light.
3. CYes, it is obligatory - in case the clearance lights break down.
4. DYes. It is obligatory to install a parking light on every vehicle, with no connection to the clearance lights.

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