Class 4 Practice Results - Restart New Quiz Restart New Quiz #1. How can you downgrade from a commercial licence to a non-commercial licence? Apply for the downgrade at a driver licensing office. Apply for the downgrade at a driver licensing office. Let your commercial licence lapse without renewing it. Let your commercial licence lapse without renewing it. Requalify for the non-commercial licence. Requalify for the non-commercial licence. Don't submit your Driver’s Medical Examination Report when you're required to do so. Don't submit your Driver’s Medical Examination Report when you're required to do so. To downgrade from a commercial licence to a non-commercial licence, visit a driver licensing office to apply for the non-commercial licence. Next