Judgment of the Court (First Chamber) of 18 January 2024.#Lietuvos notarų rūmai and Others v Lietuvos Respublikos konkurencijos taryba.#Request for a preliminary ruling from the Lietuvos vyriausiasis administracinis teismas.#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.#Case C-128/21.