Article 17 1.

If any essential change is made to the details or conditions of the consent, the notifier shall inform the competent authorities concerned and the consignee immediately and, where possible, before a shipment starts. Essential changes shall be deemed to be, inter alia, changes compared to those indicated in the notification in the quantity of waste, in the routing, including possible alternative routings, the date or dates of shipment or the carrier or carriers, or changes to the duration of the shipment, due to unforeseen circumstances occurring after the start of the shipment, leading to a shipment exceeding its period of validity.