The clock is ticking down toward legalization — here's what we learned this week. (Also, send us your questions.)

Chief Jeff DeRuyter says tougher impaired driving legislation is a good start, but more of his officers need to be trained before marijuana is legalized on July 1, 2018.

Premier Kathleen Wynne said Monday there will be zero tolerance for youths aged 21 and under, novice drivers and all commercial drivers in Ontario who have a detectable presence of drugs or alcohol in their system.