Judgment of the Court (Ninth Chamber) of 16 October 2019.#SD v Agrárminiszter.#Request for a preliminary ruling from the Budapest Környéki Közigazgatási és Munkaügyi Bíróság.#Reference for a preliminary ruling – Common agricultural policy – Apiculture sector – Regulation (EU) No 1308/2013 – Delegated Regulation (EU) 2015/1366 – Application for aid – Conditions – Minimum number of bee colonies – Fixing with retro-active effect – Principle of legal certainty – Principle of the protection of legitimate expectations.#Case C-490/18.