It varies from person to person, LittleFrieda, which is why it's difficult to set a daily limit.
Certainly the idea behind Bootcamp is that there isn't any need to weigh/count - as it's supposed to be easy to follow.
That said, Dr Briffa would say that you need to keep to under 100g carbs per day. Being more realistic about weight loss as opposed to maintenance, I would think that you should aim for under 50g carbs per day.
But the key thing is that these carbs should be coming mainly from vegetables and salad as opposed to processed foods.
If you were to follow Atkins, then you start with 20g carbs per day on induction - so presumably a level low enough that anyone would lose weight, then after this you move on to ongoing weight loss (OWL), where you increase your carbs every day by 5g until you read the point where weight loss stops and you start to put weight on. Everyone has a different level of carbs that they can tolerate.