Unless a serious breach is involved or the competitor has been seriously disadvantaged due to his playing from a wrong place, the strokes made after the incorrect ruling must stand with no penalty.
We recently visited a real race track to watch some racing and something that struck us was the difference in the burble of every car that zoomed past.
Petrol-free racing is also being backed by the European Commission, which hopes the new events can get the general public excited about alternative fuel cars.