Case T-640/16 RENV: Judgment of the General Court of 25 January 2023 — GEA Group v Commission (Competition — Agreements, decisions and concerted practices — European markets for tin-based heat stabilisers and for heat stabilisers with epoxidised soybean oil and esters as their base — Application of the ceiling of 10 % of turnover to one of the entities forming the undertaking — Annulment of the decision amending the fine imposed in the initial infringement decision — Admissibility — Interest in bringing proceedings — Fines — Limitation period — Concept of an ‘undertaking’ — Joint and several liability for payment of the fine — Rights of the defence — Right to a hearing — Equal treatment — Date by which the fine is payable in the event of amendment — Statement of reasons)