Case C-804/19: Judgment of the Court (First Chamber) of 25 February 2021 (request for a preliminary ruling from the Landesgericht Salzburg — Austria) — BU v Markt24 GmbH (Reference for a preliminary ruling — Jurisdiction, recognition and enforcement of judgments in civil and commercial matters — Regulation (EU) No 1215/2012 — Jurisdiction in respect of individual contracts of employment — Provisions of Section 5 of Chapter II — Applicability — Contract entered into in a Member State for employment with a company established in another Member State — No work performed throughout the duration of the contract — Exclusion of the application of national rules of jurisdiction — Article 21(1)(b)(i) — Concept of the ‘place where or from where the employee habitually carries out his work’ — Contract of employment — Place of performance of the contract — Obligations of the employee towards his or her employer)