The road user can do this by following the “I’m driving”-process. He must log on via his licence plate number, country of origin of the vehicle and the PIN-code received when obtaining an OBU. He must then choose: ADD VEHICLE TO MY FULL ACCOUNT. The road user must log on a second time with his Road User Portal login and password. The road user can then decide which OBU he wants to keep coupled to the vehicle.
Please note that the fast track account will be deactivated after 15 days if you don’t convert it to a full account.