Starting August 1, drivers aged 21 and younger must stay dry. Probably not a bad idea.

Under new rules unveiled this morning, drivers 21 and younger caught with any alcohol in their systems will have their licenses automatically suspended for 24 hours and could face a $500 fine. They also risk an extended 30-day license suspension.

Under the current provincial graduated licensing system, drivers who have earned a "G" license can have a small amount of alcohol in their blood. Ontario Transportation Minister Kathleen Wynne said the change is about "protecting young people and protecting the people who drive on our roads."

"Our novice drivers deserve our help to prepare them for a lifetime of safe driving," she said in a release.

Drivers caught breaking the rule three times risk losing their license.