Children's Commissioner Andrew Becroft says the car ban could benefit 100,000 Kiwi kids every week. I hope he's right.
Because here's the other thing about this law - it's at police's discretion. Like pretty much everything these days: dope, phones and now smoking with kids in the car.
Police can issue a warning if they actually see it happening and stop a car, they can refer people to support services... you can see where that's going.
Or they can issue a $50 fine.
So you roll a dice. Depends which cop you're passing. Are they more likely to stop a car with 16-year-olds in it, or babies?
And if they stop your car, is whether you're vaping really their priority? Or does it become more important whether the kid's strapped into a carseat, the rego's up to date or you're using a cellphone?
I'm all for steps in the right direction to correct and educate inappropriate behaviour, especially around children, but how can we really quantify their impact when it's at police discretion?
Surveys show about 90 per cent of people supported the banning of smoking in cars – well of course they did, who wouldn't?
But it's how you police it, how you monitor it, how many lives are truly changed by it that counts.
Let's hope the Children's Commissioner's optimism of 100,000 Kiwi kids a week benefiting from this proves right.