When you cross a public road (highway, street, etc.) with an off-road vehicle, you must not only cross where authorized to do so, but also:  

• hold a valid driver’s licence or probationary licence of any class, or hold a valid learner’s licence and abide by its conditions (that you be accompanied and not carry passengers)
• be at least 16 years old
• be at least 18 years old if you are carrying a passenger on a quad bike that has been modified by the addition of an add-on seat
• be at least 18 years old if the vehicle is a recreational off-road vehicle