On carriageways with at least two lanes reserved for traffic moving in
the direction in which he is proceeding, a driver who should be obliged,
immediately or shortly after moving back to the position prescribed by Article 10,
paragraph 3, of this Convention, to overtake again may, in order to perform that
manoeuvre, and provided he makes sure he can do so without undue inconvenience to
the drivers of faster vehicles approaching from behind, remain in the lane he has
occupied for the first overtaking manoeuvre.