Case C-128/21, Lietuvos notarų rūmai and Others: Judgment of the Court (First Chamber) of 18 January 2024 (request for a preliminary ruling from the Lietuvos vyriausiasis administracinis teismas — Lithuania) — Lietuvos notarų rūmai, M. S., S. Š, D. V., V. P., J. P., D. L.-B., D. P., R. O. I. v Lietuvos Respublikos konkurencijos taryba (Reference for a preliminary ruling — Competition — Article 101 TFEU — Concepts of ‘undertaking’ and ‘decisions of associations of undertakings’ — Decisions of the chamber of notaries of a Member State fixing the methods for calculating fees — Restriction ‘by object’ — Prohibition — Lack of justification — Fine — Imposition on the association of undertakings and its members — Perpetrator of the infringement)