@Swift and The Man: Welcome, it's nice to see new faces.
Swift wrote:
It is a defence for a person charged with and offence under subsection (1)(b) above to prove that at the time he is alleged to have committed the offence the circumstances were such that there was no liklihhod of his driving the vehicle whilst the proportion of alcohol in his breath, blood or urine remained likely to exceed the prescribed limit
On the other forum, it was suggested that prosecution could defeat any such defence by introducing circumstances where your likelihood of driving was greater than zero. For example, by postulating a police officer's requirement that the vehicle be moved. If that is so, the defence provided by 5(2) may be useless.
Also debated was what is required to be "in charge of a motor vehicle"? For example, would the mere possession of the keys be enough? Here's some example scenarios:
Assume that you've parked on the street and have no intention of driving. You and your partner have split a bottle of wine when there's a knock at the door, which you open to find a police officer who requires you to move your car. Are you now drunk in charge of the vehicle?
What if you (quite rightly, from a safety point of view) decline to move the vehicle? Can a police officer require the registered keeper to move a vehicle, or merely require its removal? What timeframe is allowed for the vehicle's removal (is enough time allowed for the keeper to sober up or find someone sober enough to drive)?
Sorry if this seems a little over the top, but we have in the SCPs a precedent for unreasonable, pedantic, and draconian enforcement where police discretion would be more appropriate. I'm wondering whether the law is such that, in theory, anyone who parks their car on the street and then has a few drinks in the privacy of their own home could be committing an offence.