Article 20
Where the trader is liable to the consumer because of any failure to supply the digital content or digital service, or because of a lack of conformity resulting from an act or omission by a person in previous links of the chain of transactions, the trader shall be entitled to pursue remedies against the person or persons liable in the chain of commercial transactions. The person against whom the trader may pursue remedies, and the relevant actions and conditions of exercise, shall be determined by national law.