As we've all perhaps heard said before, drug dealers don't ask for ID. Under the present system, which is no regulation and no control, all the decisions are being made by the criminal organizations. They decide the purity, they decide the price, and they'll sell to absolutely anybody.
We don't seem to have these problems with young people consuming alcohol so much, precisely because it is legal and because it is regulated. Our belief is that moving into a system of regulated cannabis will achieve the same results. It may take time, because the fact is that many young people are using cannabis, and perhaps inappropriately. Cannabis as medicine may turn out to be a very powerful tool to discourage use where it's not appropriate.