59Accordingly, in the light of all of the foregoing considerations, the answer to the question referred is that Article 3(1) of the First Directive must be interpreted as meaning that the concept of ‘use of vehicles’ in that article covers any use of a vehicle that is consistent with the normal function of that vehicle. That concept may therefore cover the manoeuvre of a tractor in the courtyard of a farm in order to bring the trailer attached to that tractor into a barn, as in the case in the main proceedings, which is a matter for the referring court to determine.
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