CASE HUB ARCHIVED—this archived case hub reflects the position at the date of the judgment of 20 April 2023; it is no longer maintained. See further, timeline. Case facts Outline A national reference from Spain a national reference from Spain seeking clarification as to how rulings by competition authorities, declaring some of the applicant’s supply contracts illegal, are binding on national judges. Latest developments On 20 April 2023, the Court of Justice issued its judgment holding that: (i) in respect of Article 101 TFEU (as implemented by Article 2 of Regulation 1/2003 and read in conjunction with the principle of effectiveness), an infringement of competition law found in a final decision of a national competition authority (NCA) must be regarded as established by the claimant (in an action for damages or declaration of nullity) until proven otherwise (the burden of proof shifting to the defendant), provided that the nature of the alleged infringement and its material, personal, temporal and territorial scope coincide with those of the infringement established by the NCA’s decision; and