Article 23 1.

Where a shipment of waste referred to in Article 4(4) or (5), or its recovery, cannot be completed as intended, in accordance with the Annex VII document or the contract referred to in Article 18(10), and where such shipment is not an illegal shipment, the person who has arranged the shipment in accordance with Article 18 shall immediately inform the competent authority of dispatch thereof. In such cases, the person who arranges the shipment or the consignee, following the obligations of the contract referred to in Article 18(10), shall take the waste back to the country of dispatch or ensure its recovery in an alternative way in the country of destination or elsewhere, and ensure, if necessary, that arrangements are made for the safe storage of the waste pending its return or non-interim recovery or non-interim disposal in an alternative way.