Since the mid-2000s, the FIA, motor sport's world governing body, have restricted what a Formula One driver may do on his victory lap. The sporting regulations state that at the end of a race, "all cars must proceed on the circuit directly to the post race parc fermé without stopping, without overtaking (unless clearly necessary), without receiving any object whatsoever and without any assistance (except that of the marshals if necessary)", although this rule has rarely been enforced, such as Felipe Massa taking a Brazilian flag following his victory at the 2006 Brazilian Grand Prix and more recently, Lewis Hamilton taking a British flag following his controversial victory at the 2021 British Grand Prix. It is also commonplace to see drivers overtaking on the victory lap, as well as drivers stopping to conserve a one-litre fuel sample required for post-race inspection, amongst other reasons.