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What if I am using petrol only for my CNG vehicle, will I be exempted from the ?-tank rule?

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For petrol-CNG vehicles, the ?-tank rule applies to both the petrol and CNG tanks. The CNG tank will be subject to the ?-tank rule unless the CNG system is removed. (Vehicles with the CNG system removed will still be subjected to the ?-tank rule for the petrol tank.)

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