Under Article 15 of MOT Order 2021 No. 15, what action must the municipal transport authority take if a registered taxi driver reaches the statutory retirement age or suffers physical conditions preventing safe driving?

1. Automatically transfer the certificate to the driver's eldest child
2. Cancel and deregister the driver's Taxi Driver Qualification Certificate (注销从业资格证)
3. Issue a permanent honorary lifetime commercial taxi license
4. Reduce the driver's annual continuing education requirement to zero hours while allowing driving