Who is responsible for ensuring you have a valid Ontario driver's licence?

Answer: B — You

It is ultimately your responsibility to ensure that you have a valid Ontario driver's licence. Your employer is responsible for ensuring that your licence is valid for any work-related driving, but you are responsible for maintaining a valid licence in general. The vehicle owner is responsible for ensuring the vehicle is insured and registered, but they are not responsible for your driver's licence. The Ministry of Transportation oversees the licensing process but they are not responsible for individual drivers' licences.