How often should a private car's driving license be inspected?

[Enid]

Motor vehicles should be inspected according to the following periods from the date of registration: 1. Passenger vehicles for commercial use: once a year within 5 years; once every 6 months after 5 years. 2. Trucks and large/medium non-commercial passenger vehicles: once a year within 10 years; once every 6 months after 10 years. 3. Small and mini non-commercial passenger vehicles: once every 2 years within 6 years; once a year after 6 years; once every 6 months after 15 years. 4. Motorcycles: once every 2 years within 4 years; once a year after 4 years. 5. Tractors and other motor vehicles: once a year.