The rule of interpretation contained in paragraph 4 has been based on the wording of Article 6(3) of the Treaty on European Union and takes due account of the approach to common constitutional traditions followed by the Court of Justice (e.g., judgment of 13 December 1979, Case 44/79 Hauer [1979] ECR 3727; judgment of 18 May 1982, Case 155/ 79 AM & S [1982] ECR 1575).
An riail léirithe atá i mír 4, tá sí bunaithe ar fhoclaíocht Airteagal 6(3) den Chonradh ar an Aontas Eorpach agus tugann sí aird chuí ar chur chuige na Cúirte Breithiúnais i leith na gcomhthraidisiún bunreachtúil (m.sh. breithiúnas an 13 Nollaig 1979, Cás 44/79 Hauer [1979] ECR 3727; breithiúnas an 18 Bealtaine 1982, Cás 155/79, AM & S, [1982] ECR 1575).