Must a tractor have direction indicators at the front and rear?

1. ANot in every tractor. A tractor to which a hydraulic implement is attached is exempt.
2. BNot in every tractor. A tractor most of whose work is in the field is exempt.
3. CYes. In every tractor that has a driver's cab.
4. DOnly in a tractor whose width is more than two metres.

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