Within what area of a bus stop is it forbidden to stand a vehicle?

1. AWithin an area of 12 metres before the bus stop sign and up to 12 metres after the sign, unless marked otherwise.
2. BWithin an area of 20 metres before the bus stop sign and up to 20 metres after the sign, unless marked otherwise.
3. CWithin an area of 20 metres before the bus stop sign only.
4. DWithin an area of 20 metres after the bus stop sign only.

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