The appellant appealed his conviction for having care or control of a motor vehicle with a blood-alcohol level over 80 milligrams.
He argued he had already been acquitted of the offence and that the trial judge erred in finding he had care or control.
The Court of Appeal dismissed the first ground but allowed the appeal on the second.
The Court held that the trial judge's conclusion that opening a passenger door to deposit a bag constituted a risk of danger was unreasonable, as there was no indication the appellant intended to resume driving.
The conviction was set aside and a new trial ordered.