What is the tachograph requirement when two drivers share driving in a vehicle (double manning)?
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A
Both driver cards must be inserted simultaneously — one in slot 1 (driver), one in slot 2 (co-driver)
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B
Only the active driver inserts their card — the other driver's card is not needed
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C
Cards are alternated — the active driver inserts their card only when their turn begins
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D
One card stores data for both drivers simultaneously