Correct answer
No, it is prohibited.
No. Article 7 prohibits driving when the vehicle emits gases or smoke above regulatory limits. Officers may immobilise it in the provided circumstances; a cause other than a breakdown does not remove the prohibition. The driver must cooperate with detection tests and correct the deficiency before driving again in compliance with the rules.
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All options
No, it is prohibited.
Yes, provided that it is not due to a breakdown.
Yes, in all cases.
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