Under Article 8 of the CMR Convention, what MUST a truck driver do upon taking over the cargo if they cannot verify the accuracy of statements regarding the number of packages or their condition?

1. Enter specific written reservations (Vorbehalte) on all copies of the CMR consignment note, stating the reasons for the reservation (e.g. 'sealed container, pallet count unchecked, packaging torn')
2. Refuse to drive and call the local police immediately
3. Verbally inform the loader without writing anything on the paperwork
4. Sign the CMR clean and add notes later at the destination