Judgment of the Court (Fourth Chamber) of 21 October 2021.#Beeren-, Wild-, Feinfrucht GmbH v Hauptzollamt Erfurt.#Request for a preliminary ruling from the Thüringer Finanzgericht.#Reference for a preliminary ruling – Customs union – End-use procedure – Authorisation with retroactive effect – Regulation (EU) No 952/2013 – Union Customs Code – Article 211(2) – Scope ratione temporis – Conditions – Regulation (EEC) No 2454/93 – Article 294(2)