Judgment of the Court (Eighth Chamber) of 9 March 2023.#État belge and Promo 54 v Promo 54 and État belge.#Request for a preliminary ruling from the Cour de cassation.#Reference for a preliminary ruling – Common system of value added tax (VAT) – Directive 2006/112/EC – Article 12(1) and (2) – Supply, before first occupation, of a building or parts of a building and of the land on which the building stands – No provisions in national law providing for detailed rules for applying the criterion relating to first occupation – Article 135(1)(j) – Exemptions – Supply, after conversion, of a building which was the subject of a first occupation before the conversion – National administrative legal commentary treating buildings which have undergone substantial conversions in the same way as new buildings.#Case C-239/22.