Judgment of the General Court (Third Chamber) of 11 September 2024.#Fachverband Eisenhüttenschlacken eV v European Commission.#EU fertilising products – Regulation (EU) 2019/1009 – Delegated Regulation (EU) 2022/973 – Limit values for chromium and vanadium in EU fertilising products using ferrous slags as by-products – Criteria on agronomic efficiency and safety for the use of by-products in fertilising products – Precautionary principle – Legal certainty – Proportionality – Obligation to state reasons.#Case T-560/22.