Secondary passengers will still be permitted to travel with CTN even if the lead passenger does not travel. However, if they will be travelling with a vehicle owned by the lead passenger, they should ensure they have the vehicle documents with them, including power of attorney from the vehicle owner to the vehicle driver. Alternatively, the secondary passengers can change the vehicle and the vehicle owner on the booking (subject to availability and applicable fees).
Additionally, it is advisable to carry the vehicle registration documents and ensure that your name is included in the vehicle's insurance information. This can help avoid complications during travel. Furthermore, checking with relevant authorities or the embassy of your destination can provide clarity on any additional documentation requirements specific to your travel route.